Swimmers in a pool with clear blue water
Backstroke & crowded lanes carry hidden dangers

Where are head injuries happening?

One collision can change the future for a young swimmer

Head injuries can take you out for the meet...or out for the season.

Assess your risk level

Hammer Head Swim Cap

Regular price $34.95 USD Sale price $34.95 USD
Free Standard Shipping on all Domestic Orders over $50!
  • 1-Year No-Tear Guarantee
  • It Won't Slow You Down
  • Looks Like A Dome Racing Cap
  • Wear With Your Team Cap
Choose Your Color Black
Choose Your Cap Size Small - 19″ to 20.5″ heads
> In stock

How do I measure for the right Hammer Head size?

It’s easy. Just measure the circumference of the head about 1 inch above the ears — that’s the sweet spot for an accurate fit.

For racing or a more compressed feel, wear your team cap over your Hammer Head and goggles. This gives you our signature smooth, wrinkle-free dome for maximum speed and hydrodynamics.

For the best comfort and performance, wear your Hammer Head with the logo centered in front. That’s how the cap is engineered to fit just right.

For aquatic athletes with long hair, be sure to make a low ponytail in the back and tuck your hair up inside the back of your Hammer Head swim cap.

Hammer Head is designed to look sleek, smooth, and streamlined in the water. The protective honeycomb layer is hidden inside, so all you’ll see on the outside is a clean, wrinkle-free dome — not a bulky helmet.

It fits just like a high-performance swim cap, only better:
No wrinkles that slow you down
No bulky shape or awkward profile
A smooth, hydrodynamic silhouette that looks fast and feels even faster

Most swimmers say it’s the best-looking cap they’ve ever worn — and the most confidence-boosting.

Protection you can’t see. Performance you can feel.

Yes. Hammer Head’s patented, multi-layered design naturally offers more insulation than thin silicone or latex caps. The thicker top layer and protective honeycomb structure help retain heat, making it a great choice for swimmers training in cold pools, open water, or early-morning practices.

While Hammer Head isn’t designed as a thermal cap, many athletes tell us they feel noticeably warmer and more comfortable in cooler conditions — without extra bulk and without affecting speed or stroke mechanics.

Warmth, comfort, and protection — all in one cap!

Hammer Head underwent drop testing by ACT Labs, the global consumer product testing lab, and was proven to reduce impact force by more than 50% compared to silicone and dome caps — making it the safest cap in the water.

But we didn’t stop at safety.

Olympic legend and performance expert Dr. Gary Hall, Sr. tested Hammer Head for drag reduction and found it to be up to 10.5% faster than traditional wrinkled silicone or latex caps. That’s the power of our wrinkle-free Honeycomb Impact Technology.

We strongly recommend wearing it in practice, meet warm-ups, and competition — because protection and performance belong in every lap.

Why does Hammer Head® cost more than a traditional silicone or latex cap?

Because it’s engineered to do more — and last far longer.

Most silicone caps cost $10–$15, but swimmers typically burn through 4–5 per year, spending $40–$75 annually on caps that tear, stretch, or wear out.

Hammer Head is $34.95 and built to last years, not months. That makes it the smarter long-term value and the only cap that delivers four game-changing benefits:

Head Safety, Speed, Comfort and Durability!

Aquatic sports have embraced innovation in tech suits, goggles, training gear, and nutrition. It’s time we all expect more from a swim cap — and Hammer Head is the next evolution.

The Hammer Head logo always goes in the front and the cap size is labeled on the inside back of the cap.

Hammer Head is built to work quietly behind the scenes while your team and sponsors shine out front. Just slip your Hammer Head on first, then layer your team cap over the top for practice or competition.

The result?
A perfectly smooth, wrinkle-free racing surface
Better body position and hydrodynamics

More confidence to train and race aggressively

You get all the safety and performance benefits — while your team logo gets the spotlight.

For team orders contact us at info@hammerheadswimcaps.com



How do I care for my Hammer Head?

After each swim, simply rinse your Hammer Head and turn it inside out to dry completely. Avoid contact with sharp objects that could puncture the cap — treat it well, and it will deliver long-lasting performance.

Want A Bunch For Your Team?

For a custom quote and quantity discount information with or without your team logo CONTACT US NOW.

Many coaches are requiring their 10&U swimmers to wear Hammer Head swim caps by including it in their registration kit.

Email us at: info@hammerheadswimcaps.com
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Testimonials

Chris Dahowski
Chris Dahowski Head Coach, Paseo Aquatics

"Because accidental head hits happen so often in the pool, we now require all our Junior-level athletes to wear Hammer Head swim caps in practice and at meets. The safety-first message truly resonates with our swim parents and reinforces our commitment to athlete well-being."

Jill Gage
Jill Gage Swim Mom, Proud Hammer Head Customer

"My daughter Sierra suffered a concussion during the 50-yard backstroke after misjudging her stroke count. She was out of the pool for over a month. While searching for a way to keep her safe, I discovered Hammer Head and immediately shared it with her coach. Now, she never swims without it. Don’t wait until it’s too late—protect your swimmer today!"

Rowdy Gaines
Rowdy Gaines 3x Olympic Gold Medalist & Voice of USA Swimming

"Hammer Head is a simple yet essential piece of equipment for every swimmer. Let’s be real—head hits happen every day, above and below the surface. For the first time ever, Hammer Head combines 50% greater head protection, up to 10.5% more speed, and unmatched durability that outlasts any other cap."

Gary Hall, Sr.
Gary Hall, Sr. 3x Olympian & Founder of The Race Club

"In a drag study test, we found that swimmers wearing Hammer Head’s innovative design at top race speeds experienced up to a 10.5% reduction in passive drag compared to traditional silicone caps. In a 50-meter freestyle, that can mean shaving tenths of a second — the difference between winning and losing."

Josh Davis
Josh Davis 3x Olympic Gold Medalist & NCAA Swim Coach

"Safety is everything in our sport—emotional, mental, and physical. That’s why I’m proud to partner with Hammer Head, a brand that truly shares those values. You’ve got to check them out! Hammer Head is the safest, fastest, most comfortable, and longest-lasting swim cap in the world."

Chris Dahowski
Chris Dahowski Head Coach, Paseo Aquatics

"Because accidental head hits happen so often in the pool, we now require all our Junior-level athletes to wear Hammer Head swim caps in practice and at meets. The safety-first message truly resonates with our swim parents and reinforces our commitment to athlete well-being."

Jill Gage
Jill Gage Swim Mom, Proud Hammer Head Customer

"My daughter Sierra suffered a concussion during the 50-yard backstroke after misjudging her stroke count. She was out of the pool for over a month. While searching for a way to keep her safe, I discovered Hammer Head and immediately shared it with her coach. Now, she never swims without it. Don’t wait until it’s too late—protect your swimmer today!"

Rowdy Gaines
Rowdy Gaines 3x Olympic Gold Medalist & Voice of USA Swimming

"Hammer Head is a simple yet essential piece of equipment for every swimmer. Let’s be real—head hits happen every day, above and below the surface. For the first time ever, Hammer Head combines 50% greater head protection, up to 10.5% more speed, and unmatched durability that outlasts any other cap."

Gary Hall, Sr.
Gary Hall, Sr. 3x Olympian & Founder of The Race Club

"In a drag study test, we found that swimmers wearing Hammer Head’s innovative design at top race speeds experienced up to a 10.5% reduction in passive drag compared to traditional silicone caps. In a 50-meter freestyle, that can mean shaving tenths of a second — the difference between winning and losing."

Josh Davis
Josh Davis 3x Olympic Gold Medalist & NCAA Swim Coach

"Safety is everything in our sport—emotional, mental, and physical. That’s why I’m proud to partner with Hammer Head, a brand that truly shares those values. You’ve got to check them out! Hammer Head is the safest, fastest, most comfortable, and longest-lasting swim cap in the world."

Chris Dahowski
Chris Dahowski Head Coach, Paseo Aquatics

"Because accidental head hits happen so often in the pool, we now require all our Junior-level athletes to wear Hammer Head swim caps in practice and at meets. The safety-first message truly resonates with our swim parents and reinforces our commitment to athlete well-being."

Jill Gage
Jill Gage Swim Mom, Proud Hammer Head Customer

"My daughter Sierra suffered a concussion during the 50-yard backstroke after misjudging her stroke count. She was out of the pool for over a month. While searching for a way to keep her safe, I discovered Hammer Head and immediately shared it with her coach. Now, she never swims without it. Don’t wait until it’s too late—protect your swimmer today!"

Rowdy Gaines
Rowdy Gaines 3x Olympic Gold Medalist & Voice of USA Swimming

"Hammer Head is a simple yet essential piece of equipment for every swimmer. Let’s be real—head hits happen every day, above and below the surface. For the first time ever, Hammer Head combines 50% greater head protection, up to 10.5% more speed, and unmatched durability that outlasts any other cap."

Gary Hall, Sr.
Gary Hall, Sr. 3x Olympian & Founder of The Race Club

"In a drag study test, we found that swimmers wearing Hammer Head’s innovative design at top race speeds experienced up to a 10.5% reduction in passive drag compared to traditional silicone caps. In a 50-meter freestyle, that can mean shaving tenths of a second — the difference between winning and losing."

Josh Davis
Josh Davis 3x Olympic Gold Medalist & NCAA Swim Coach

"Safety is everything in our sport—emotional, mental, and physical. That’s why I’m proud to partner with Hammer Head, a brand that truly shares those values. You’ve got to check them out! Hammer Head is the safest, fastest, most comfortable, and longest-lasting swim cap in the world."

Chris Dahowski
Chris Dahowski Head Coach, Paseo Aquatics

"Because accidental head hits happen so often in the pool, we now require all our Junior-level athletes to wear Hammer Head swim caps in practice and at meets. The safety-first message truly resonates with our swim parents and reinforces our commitment to athlete well-being."

Jill Gage
Jill Gage Swim Mom, Proud Hammer Head Customer

"My daughter Sierra suffered a concussion during the 50-yard backstroke after misjudging her stroke count. She was out of the pool for over a month. While searching for a way to keep her safe, I discovered Hammer Head and immediately shared it with her coach. Now, she never swims without it. Don’t wait until it’s too late—protect your swimmer today!"

Rowdy Gaines
Rowdy Gaines 3x Olympic Gold Medalist & Voice of USA Swimming

"Hammer Head is a simple yet essential piece of equipment for every swimmer. Let’s be real—head hits happen every day, above and below the surface. For the first time ever, Hammer Head combines 50% greater head protection, up to 10.5% more speed, and unmatched durability that outlasts any other cap."

Gary Hall, Sr.
Gary Hall, Sr. 3x Olympian & Founder of The Race Club

"In a drag study test, we found that swimmers wearing Hammer Head’s innovative design at top race speeds experienced up to a 10.5% reduction in passive drag compared to traditional silicone caps. In a 50-meter freestyle, that can mean shaving tenths of a second — the difference between winning and losing."

Josh Davis
Josh Davis 3x Olympic Gold Medalist & NCAA Swim Coach

"Safety is everything in our sport—emotional, mental, and physical. That’s why I’m proud to partner with Hammer Head, a brand that truly shares those values. You’ve got to check them out! Hammer Head is the safest, fastest, most comfortable, and longest-lasting swim cap in the world."

Chris Dahowski
Chris Dahowski Head Coach, Paseo Aquatics

"Because accidental head hits happen so often in the pool, we now require all our Junior-level athletes to wear Hammer Head swim caps in practice and at meets. The safety-first message truly resonates with our swim parents and reinforces our commitment to athlete well-being."

Jill Gage
Jill Gage Swim Mom, Proud Hammer Head Customer

"My daughter Sierra suffered a concussion during the 50-yard backstroke after misjudging her stroke count. She was out of the pool for over a month. While searching for a way to keep her safe, I discovered Hammer Head and immediately shared it with her coach. Now, she never swims without it. Don’t wait until it’s too late—protect your swimmer today!"

Rowdy Gaines
Rowdy Gaines 3x Olympic Gold Medalist & Voice of USA Swimming

"Hammer Head is a simple yet essential piece of equipment for every swimmer. Let’s be real—head hits happen every day, above and below the surface. For the first time ever, Hammer Head combines 50% greater head protection, up to 10.5% more speed, and unmatched durability that outlasts any other cap."

Gary Hall, Sr.
Gary Hall, Sr. 3x Olympian & Founder of The Race Club

"In a drag study test, we found that swimmers wearing Hammer Head’s innovative design at top race speeds experienced up to a 10.5% reduction in passive drag compared to traditional silicone caps. In a 50-meter freestyle, that can mean shaving tenths of a second — the difference between winning and losing."

Josh Davis
Josh Davis 3x Olympic Gold Medalist & NCAA Swim Coach

"Safety is everything in our sport—emotional, mental, and physical. That’s why I’m proud to partner with Hammer Head, a brand that truly shares those values. You’ve got to check them out! Hammer Head is the safest, fastest, most comfortable, and longest-lasting swim cap in the world."

Chris Dahowski
Chris Dahowski Head Coach, Paseo Aquatics

"Because accidental head hits happen so often in the pool, we now require all our Junior-level athletes to wear Hammer Head swim caps in practice and at meets. The safety-first message truly resonates with our swim parents and reinforces our commitment to athlete well-being."

Jill Gage
Jill Gage Swim Mom, Proud Hammer Head Customer

"My daughter Sierra suffered a concussion during the 50-yard backstroke after misjudging her stroke count. She was out of the pool for over a month. While searching for a way to keep her safe, I discovered Hammer Head and immediately shared it with her coach. Now, she never swims without it. Don’t wait until it’s too late—protect your swimmer today!"

Rowdy Gaines
Rowdy Gaines 3x Olympic Gold Medalist & Voice of USA Swimming

"Hammer Head is a simple yet essential piece of equipment for every swimmer. Let’s be real—head hits happen every day, above and below the surface. For the first time ever, Hammer Head combines 50% greater head protection, up to 10.5% more speed, and unmatched durability that outlasts any other cap."

Gary Hall, Sr.
Gary Hall, Sr. 3x Olympian & Founder of The Race Club

"In a drag study test, we found that swimmers wearing Hammer Head’s innovative design at top race speeds experienced up to a 10.5% reduction in passive drag compared to traditional silicone caps. In a 50-meter freestyle, that can mean shaving tenths of a second — the difference between winning and losing."

Josh Davis
Josh Davis 3x Olympic Gold Medalist & NCAA Swim Coach

"Safety is everything in our sport—emotional, mental, and physical. That’s why I’m proud to partner with Hammer Head, a brand that truly shares those values. You’ve got to check them out! Hammer Head is the safest, fastest, most comfortable, and longest-lasting swim cap in the world."

Chris Dahowski
Chris Dahowski Head Coach, Paseo Aquatics

"Because accidental head hits happen so often in the pool, we now require all our Junior-level athletes to wear Hammer Head swim caps in practice and at meets. The safety-first message truly resonates with our swim parents and reinforces our commitment to athlete well-being."

Jill Gage
Jill Gage Swim Mom, Proud Hammer Head Customer

"My daughter Sierra suffered a concussion during the 50-yard backstroke after misjudging her stroke count. She was out of the pool for over a month. While searching for a way to keep her safe, I discovered Hammer Head and immediately shared it with her coach. Now, she never swims without it. Don’t wait until it’s too late—protect your swimmer today!"

Rowdy Gaines
Rowdy Gaines 3x Olympic Gold Medalist & Voice of USA Swimming

"Hammer Head is a simple yet essential piece of equipment for every swimmer. Let’s be real—head hits happen every day, above and below the surface. For the first time ever, Hammer Head combines 50% greater head protection, up to 10.5% more speed, and unmatched durability that outlasts any other cap."

Gary Hall, Sr.
Gary Hall, Sr. 3x Olympian & Founder of The Race Club

"In a drag study test, we found that swimmers wearing Hammer Head’s innovative design at top race speeds experienced up to a 10.5% reduction in passive drag compared to traditional silicone caps. In a 50-meter freestyle, that can mean shaving tenths of a second — the difference between winning and losing."

Josh Davis
Josh Davis 3x Olympic Gold Medalist & NCAA Swim Coach

"Safety is everything in our sport—emotional, mental, and physical. That’s why I’m proud to partner with Hammer Head, a brand that truly shares those values. You’ve got to check them out! Hammer Head is the safest, fastest, most comfortable, and longest-lasting swim cap in the world."

Chris Dahowski
Chris Dahowski Head Coach, Paseo Aquatics

"Because accidental head hits happen so often in the pool, we now require all our Junior-level athletes to wear Hammer Head swim caps in practice and at meets. The safety-first message truly resonates with our swim parents and reinforces our commitment to athlete well-being."

Jill Gage
Jill Gage Swim Mom, Proud Hammer Head Customer

"My daughter Sierra suffered a concussion during the 50-yard backstroke after misjudging her stroke count. She was out of the pool for over a month. While searching for a way to keep her safe, I discovered Hammer Head and immediately shared it with her coach. Now, she never swims without it. Don’t wait until it’s too late—protect your swimmer today!"

Rowdy Gaines
Rowdy Gaines 3x Olympic Gold Medalist & Voice of USA Swimming

"Hammer Head is a simple yet essential piece of equipment for every swimmer. Let’s be real—head hits happen every day, above and below the surface. For the first time ever, Hammer Head combines 50% greater head protection, up to 10.5% more speed, and unmatched durability that outlasts any other cap."

Gary Hall, Sr.
Gary Hall, Sr. 3x Olympian & Founder of The Race Club

"In a drag study test, we found that swimmers wearing Hammer Head’s innovative design at top race speeds experienced up to a 10.5% reduction in passive drag compared to traditional silicone caps. In a 50-meter freestyle, that can mean shaving tenths of a second — the difference between winning and losing."

Josh Davis
Josh Davis 3x Olympic Gold Medalist & NCAA Swim Coach

"Safety is everything in our sport—emotional, mental, and physical. That’s why I’m proud to partner with Hammer Head, a brand that truly shares those values. You’ve got to check them out! Hammer Head is the safest, fastest, most comfortable, and longest-lasting swim cap in the world."

Case Study

Brooke's Injury Story

Miscounts in the backstroke lead to concussion