--- title: What Are Mouthguards Made Of? Thermopolymer vs EVA Material description: Not all mouthguards are created equal. Learn the difference between common EVA mouthguard material and SISU's patented Diffusix tech thermopolymer. image: https://blog.sisuguard.com/hubfs/Guards_8-1-378174-edited.jpg --- Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. Created with Sketch. ## Latest Stories Search this site on Google S [![SISU](https://blog.sisuguard.com/hs-fs/hub/212277/file-1448685003.jpg?width=20&name=file-1448685003.jpg)  SISU](https://blog.sisuguard.com/author/team-sisu) May 11, 2026 ## [Red, White & Tournament Blue: Why Liberty Camo ...](https://blog.sisuguard.com/red-white-tournament-blue-why-liberty-camo-was-made-for-summer-sports) [Soccer](https://blog.sisuguard.com/topic/soccer) [Lacrosse](https://blog.sisuguard.com/topic/lacrosse) [sports protection](https://blog.sisuguard.com/topic/sports-protection) [sports](https://blog.sisuguard.com/topic/sports) [field hockey](https://blog.sisuguard.com/topic/field-hockey) [summer](https://blog.sisuguard.com/topic/summer) [protection](https://blog.sisuguard.com/topic/protection) [Flag Football](https://blog.sisuguard.com/topic/flag-football) [volleyball](https://blog.sisuguard.com/topic/volleyball) [**](https://blog.sisuguard.com/red-white-tournament-blue-why-liberty-camo-was-made-for-summer-sports) [![SISU](https://blog.sisuguard.com/hs-fs/hub/212277/file-1448685003.jpg?width=20&name=file-1448685003.jpg)  SISU](https://blog.sisuguard.com/author/team-sisu) Aug 01, 2025 ## [From the Sidelines to the Spotlight](https://blog.sisuguard.com/from-the-sidelines-to-the-spotlight) [Soccer](https://blog.sisuguard.com/topic/soccer) [Basketball](https://blog.sisuguard.com/topic/basketball) [Sports Safety](https://blog.sisuguard.com/topic/sports-safety) [sports protection](https://blog.sisuguard.com/topic/sports-protection) [sports](https://blog.sisuguard.com/topic/sports) [women](https://blog.sisuguard.com/topic/women) [Flag Football](https://blog.sisuguard.com/topic/flag-football) [volleyball](https://blog.sisuguard.com/topic/volleyball) [**](https://blog.sisuguard.com/from-the-sidelines-to-the-spotlight) [![SISU](https://blog.sisuguard.com/hs-fs/hub/212277/file-1448685003.jpg?width=20&name=file-1448685003.jpg)  SISU](https://blog.sisuguard.com/author/team-sisu) Apr 02, 2025 ## [From Sweden to Sports Fields Everywhere: The Gl...](https://blog.sisuguard.com/from-sweden-to-sports-fields-everywhere-the-global-journey-of-sisu-mouthguards) [Mouthguard Technology](https://blog.sisuguard.com/topic/mouthguard-technology) [Sports Safety](https://blog.sisuguard.com/topic/sports-safety) [mouthguard](https://blog.sisuguard.com/topic/mouthguard) [SISU](https://blog.sisuguard.com/topic/sisu) [technology](https://blog.sisuguard.com/topic/technology) [**](https://blog.sisuguard.com/from-sweden-to-sports-fields-everywhere-the-global-journey-of-sisu-mouthguards) [![SISU](https://blog.sisuguard.com/hs-fs/hub/212277/file-1448685003.jpg?width=20&name=file-1448685003.jpg)  SISU](https://blog.sisuguard.com/author/team-sisu) Mar 28, 2025 ## [Spring Sports Safety Guide: What Every Athlete ...](https://blog.sisuguard.com/spring-sports-safety-guide-what-every-athlete-needs-to-stay-protected) [Mouthguard Technology](https://blog.sisuguard.com/topic/mouthguard-technology) [Kids mouth guard](https://blog.sisuguard.com/topic/kids-mouth-guard) [Lacrosse](https://blog.sisuguard.com/topic/lacrosse) [Rugby](https://blog.sisuguard.com/topic/rugby) [sports](https://blog.sisuguard.com/topic/sports) [softball](https://blog.sisuguard.com/topic/softball) [baseball](https://blog.sisuguard.com/topic/baseball) [springsports](https://blog.sisuguard.com/topic/springsports) [protection](https://blog.sisuguard.com/topic/protection) [**](https://blog.sisuguard.com/spring-sports-safety-guide-what-every-athlete-needs-to-stay-protected) ## Featured Stories Categories - [Mouthguard Technology](https://blog.sisuguard.com/topic/mouthguard-technology) - [Sports Safety](https://blog.sisuguard.com/topic/sports-safety) - [mouthguard](https://blog.sisuguard.com/topic/mouthguard) - [Concussion Discussion](https://blog.sisuguard.com/topic/concussion-discussion) - [Lacrosse](https://blog.sisuguard.com/topic/lacrosse) [![Sierra Soleimani](https://blog.sisuguard.com/hubfs/sierraprofile.jpg)](https://blog.sisuguard.com/author/sierra-soleimani) By [Sierra Soleimani](https://blog.sisuguard.com/author/sierra-soleimani) March 04, 2016 [**](https://www.facebook.com/sharer/sharer.php?u=https%3A%2F%2Fblog.sisuguard.com%2Fmaterials-spotlight-thermopolymer-vs-eva-mouth-guard) [**](http://www.linkedin.com/shareArticle?mini=true&url=https://blog.sisuguard.com/materials-spotlight-thermopolymer-vs-eva-mouth-guard) [**](https://www.twitter.com/share?url=https%3A%2F%2Fblog.sisuguard.com%2Fmaterials-spotlight-thermopolymer-vs-eva-mouth-guard) [**](https://plus.google.com/share?url=https%3A%2F%2Fblog.sisuguard.com%2Fmaterials-spotlight-thermopolymer-vs-eva-mouth-guard) # [Materials Matter: Thermopolymer Vs EVA Mouth Guard](https://blog.sisuguard.com/materials-spotlight-thermopolymer-vs-eva-mouth-guard) **  [Mouthguard Technology](https://blog.sisuguard.com/topic/mouthguard-technology) ![Guards_8-1-378174-edited.jpg](https://blog.sisuguard.com/hs-fs/hubfs/Guards_8-1-378174-edited.jpg?width=583&name=Guards_8-1-378174-edited.jpg "Guards_8-1-378174-edited.jpg")Let's face it: not all materials are created equal.  Since the 1960s, conventional mouthguards have been made with ethylene vinyl acetate (EVA) - a rubber-like material that caves under pressure. Yes, quite literally...  EVA mouthguard material is an [elastomer](https://en.wikipedia.org/wiki/Elastomer) [polymer](https://en.wikipedia.org/wiki/Polymer) that has soft, flexible and rubber-like properties. Its purpose is to cushion the force of impact, before it travels to the teeth. However, conventional mouthguards that are made from this material are too soft to absorb the entirety of the force of impact, and some of the force will travel through to player's teeth.   Think of a bowling ball and a mattress. When you drop the heavy object on the soft material, it caves in and compresses to a direct point. The force that travels to your teeth is concentrated at that single point.   ![Screen_Shot_2016-02-25_at_12.05.09_PM.png](https://blog.sisuguard.com/hs-fs/hubfs/Screen_Shot_2016-02-25_at_12.05.09_PM.png?width=527&height=324&name=Screen_Shot_2016-02-25_at_12.05.09_PM.png "Screen_Shot_2016-02-25_at_12.05.09_PM.png")   This is where the innovation comes in. SISU is made from a non-compressible [thermopolymer ](https://en.wikipedia.org/wiki/Thermoplastic)material that distributes that force of impact throughout the surface of the mouth guard, rather than allowing it to travel through to your teeth. Using unique impact-absorbing perforations and special "crumple zones" SISU oscillates on impact and directs harmful   forces away from your teeth. When a SISU mouthguard is properly fitted, the energy-absorbing zones redirect forces away from your teeth, reducing the risk of dental injury. ![Screen_Shot_2016-02-25_at_12.05.16_PM.png](https://blog.sisuguard.com/hs-fs/hubfs/Screen_Shot_2016-02-25_at_12.05.16_PM.png?width=484&height=302&name=Screen_Shot_2016-02-25_at_12.05.16_PM.png "Screen_Shot_2016-02-25_at_12.05.16_PM.png")   Working in perfect unison with SISU's patented [Diffusix technology](http://www.sisuguard.com/diffusix-technology/), SISU's thermopolymer: - 8 times more resistant to deformation  - Withstands up to 50% more impact - Remoldable - Works with braces and - Creates a custom fit that allows you to keep the guard in your mouth during the entire game or practice To learn more about SISU's protective properties, check out our website at [www.sisuguard.com/the-science-of-sisu/](http://www.sisuguard.com/the-science-of-sisu/).   [![team discount mouthguard](https://no-cache.hubspot.com/cta/default/212277/f3d7dec8-adad-4249-8719-aa633bd1b8bd.png)](https://cta-redirect.hubspot.com/cta/redirect/212277/f3d7dec8-adad-4249-8719-aa633bd1b8bd) ### Popular Stories [5 Ways to Sanitize Your Mouthguard After Being Sick](https://blog.sisuguard.com/5-ways-to-sanitize-your-mouthguard-after-being-sick) Feb 12, 2016 [4 Ways To Check Your SISU Mouthguard Fit](https://blog.sisuguard.com/4-step-sisu-mouthguard-fit-check) Dec 23, 2015 [Is your mouthguard making you sick?](https://blog.sisuguard.com/is-your-mouthguard-making-you-sick) Aug 07, 2015 [Throwback: The Evolution of Mouthguards](https://blog.sisuguard.com/tbt-history-of-mouthguards) May 21, 2015 [SISU Mouthguard: Warranty & Returns](https://blog.sisuguard.com/sisu-mouthguard-warranty-returns) Mar 15, 2016 ### Subscribe Email ### Popular Tags [Mouthguard Technology](https://blog.sisuguard.com/topic/mouthguard-technology) [Sports Safety](https://blog.sisuguard.com/topic/sports-safety) 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