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4 avg. (5 reviews)

Custom Mouthguard

Flexible, remoldable material · BPA-, latex-, PVC-, and phthalate-free

This custom mouthguard is made to protect teeth in a more comfortable way. It’s about half as thin as other mouthguards and you mold it to a perfect, custom fit yourself at home. (It’s remoldable up to 20 times.) A perforated surface redirects impact away from teeth and allows for better airflow. You can talk and breathe normally and even drink with it in—you just might forget you’re wearing it. Made in the USA.

  • View the size chart to find your fit
  • Instructions: See guide for fitting instructions. The guard should not be too tight or too loose. You should be able to remove with fingers but not with your tongue
  • Thin design with flexible material makes the mouthguard comfortable. When heated, provides custom fit, remoldable up to 20 times
  • Perforated construction provides natural flow of air and saliva to allow wearer to talk normally, breathe naturally, and stay hydrated
  • Patented Diffusix™ technology distributes impact to redirect force away from teeth. Rounded beveled edges soften the point of contact between the guard and the mouth
  • Used for youth sports, such as lacrosse, soccer, basketball, roller derby and more
  • BPA-, latex-, PVC-, and phthalate-free
  • $35,000 Dental Warranty
  • Please note: Do not overheat the mouth guard (over 170° Fahrenheit)
Made in the USA




One mouthguard, optional freshening spray and case


Mouthguard: 2.75" x 2" x 0.06"; Optional Case: 6.5" x 4.5" x 1"; Optional Freshening Spray: 4.75" x 1.3" x 1.3"


Mouthguard: 0.0625 lb; Optional Case: 0.063 lb; Optional Freshening Spray: 0.2 lb


Mouthguard: Medical grade thermo-polymer; Optional Case: Polypropylene plastic; Optional Freshening Spray: Water, glycerin, hydrogenated castor oil, xylitol, peppermint oil, metal salycilate, sucralose, rosemary extract, sodium benzoate, potassium sorbet, citric acid, mixed tocopherols, spearmint extract, cinnamon bark, coconut oil, zinc acetate


Keep out of sunlight and extreme heat. Clean your guard using a non-whitening toothpaste or soak in 3% hydrogen peroxide for 10 minutes only. Do not use denture tablets, dish soap, or harsh cleansers. Avoid products containing alcohol



The idea to create the SISU mouthguard was born on the operating table. Maker Jan Akervall wanted to help protect the teeth of his patients. As an otolaryngology surgeon, he knew their teeth were often exposed to potential damage during procedures. Back at home, Dr. Akervall’s kids were complaining about the mouthguards they had to wear while playing sports. He and his wife Sassa realized the protection he envisioned for his patients’ teeth was also the perfect fit for sports-playing kids and grown-ups. His SISU mouthguards are a fresh new approach to protecting teeth. The bulk has been streamlined out without sacrificing strength, thanks to an impact-absorbing perforated surface that won’t collapse, but instead redirects impact away from teeth. The mouthguard is lightweight, breathable, and so comfortable, many athletes forget they have one in. (Really!) It’s up to 50% thinner than others, so you can easily drink and talk with one in. The best part might be that with SISU, you get a truly custom fit. You can mold it yourself at home and it is remoldable up to 20 times.