Lacrosse Mouthguard Rules: NFHS, NCAA and Color Changes

Lacrosse requires a mouthguard at the high school and college levels that follow NFHS or NCAA rules. Color and attachment rules have changed recently — especially for boys high school play in 2026. This article focuses on the published mouthguard rules. For fit, model picks and how to order, use our lacrosse mouthguard guide and the combined hockey and lacrosse mouthguard guide.

Always confirm with your state association, conference or club handbook. Local interpretations can add detail on top of the national rulebook.

Is a mouthguard required in lacrosse?

Yes at the high school and college levels covered by NFHS and NCAA lacrosse rules. The American Dental Association states that the NFHS and the NCAA mandate mouthguards in lacrosse (along with football, field hockey and ice hockey). The NFHS Sports Medicine Advisory Committee's Position Statement and Recommendations for Mouthguard Use in Sports (October 2022) likewise lists lacrosse among the sports where the NFHS mandates mouthguard use.

Youth and club programs write their own equipment sheets. Check your league handbook rather than assuming high school rules apply.

NFHS boys lacrosse 2026: color restrictions removed

For the 2026 high school boys lacrosse season, USA Lacrosse and NFHS updated the mouthguard equipment language. Per the USA Lacrosse announcement of 2026 boys rule changes (Rule 1-9-1B, 4 & 5):

• No color restrictions: there are no longer any color restrictions for mouthguards, including a lack of color — white and clear are allowed.
• Decorative / non-protective attachments banned: mouth attachments that serve no protective purpose or are purely decorative are prohibited.

The matching NFHS story on the 2026 boys changes notes that Rule 1-9-1b, 4 and 5 was modified to align with other NFHS rules codes on tooth and mouth protectors.

In practice: a clear or white NanoBite can meet the 2026 boys high school color language, but skip charms, spinners or other decorative attachments that do not protect the teeth.

NFHS girls lacrosse: clear/white OK, no tabs or charms

Girls high school lacrosse already allows a wide range of mouthguard appearances. The NFHS Girls Lacrosse Rules Interpretations — 2024 (Situation 3) state that tooth and mouth protectors that are clear, white, colored and with graphics are permitted. The same interpretation rules that field players' tooth and mouth protectors shall not have spinning parts, charms or protruding tabs, and that tooth aligners (such as Invisalign) are not legal as tooth and mouth protectors because they are not created for protection. Printed graphics such as fangs on the outside of a real protector can be legal equipment under that example.

For girls NFHS play, use a real athletic mouthguard that covers as required — not an aligner, and not a guard with spinning parts, charms or protruding tabs.

NCAA men's lacrosse: clear mouthpieces now OK

College men's lacrosse requires an intra-oral mouthpiece for every competing player. In the 2025–26 NCAA men's lacrosse rules (Rule 1, Section 20 — Helmet, Face Mask and Mouthpiece), all competing players shall wear intra-oral mouthpieces during play. The mouthpieces can be clear or any other color and shall cover all upper-jaw teeth. Source: NCAA Men's Lacrosse Rules (2025–26). The book's rules-change summary also lists that clear mouthpieces are permitted.

Failure to wear a required mouthpiece (unless it comes out during play) is listed among the technical fouls in that rulebook.

NCAA women's lacrosse: no protruding tabs for field players

NCAA women's lacrosse is specific about how the mouthpiece is built. Per Section 17 (Mouthpiece) in the NCAA Women's Lacrosse Rules Book:

• All players shall properly wear a professionally manufactured intra-oral mouthpiece that fully covers the upper jaw teeth.
• The mouthpiece shall not be altered to decrease protection.
• There may be no protruding tabs for field players.
• A properly fitted mouthpiece is recommended (for example, made from an impression of the individual's teeth, fitted by impressing the teeth into the mouthpiece, or provided by a dental professional).

That recommendation lines up with a custom AlienGuard molded from your impression, not cut down, and without a dangling tab for field play.

Youth and club leagues

Youth, club and summer leagues often follow USA Lacrosse guidance or write their own equipment rules. Confirm with your club director before you order, especially if you play multiple leagues in one season.

Lacrosse with braces

Athletes with braces can get AlienGuards. Do not use our at-home impression kit over braces; that can damage the appliances. Have your dentist take an impression or 3D scan, then ship it to us or email it to impressions@alienguards.com. More detail in mouthguards for orthodontic patients.

A stock or poorly fitted boil-and-bite guard is a poor match for braces. The ADA describes stock mouthguards as the least effective type because of generic shape and poor retention.

Which AlienGuard for lacrosse?

Our pick is NanoBite, our 4 mm ultra-slim team-sports guard and the best of our models for breathing and talking. NanoBite is built for lacrosse and other contact team sports (including football, hockey, basketball, wrestling, BJJ, rugby, soccer and field hockey).

Origin and Origin Pro are our 5 mm combat guards for boxing, MMA, Muay Thai, kickboxing, karate and taekwondo. They are not our recommendation for lacrosse.

A custom guard made from your impression stays put better than a loose tray. If yours already slips, read why does my mouthguard fall out?

Ordering and team orders

Every AlienGuard is made from your own impression. We ship an at-home kit, you take the impression (about 10 minutes), and your custom mouthguard is crafted within 10–14 business days after we receive a good impression, then shipped with tracking. Accessory-only orders (case, kit, putty) ship in a couple of business days.

Teams of 5 or more get 20% off through team orders, including NanoBite and PowerBite, with your logo plus athlete names or numbers. Metallic, satin and holographic text colors are free.

Related rules reading: football mouthguard rules, hockey mouthguard rules, basketball mouthguard rules, field hockey mouthguard rules, and our broader how to choose a mouthguard for your sport guide.

Lacrosse mouthguard rules FAQ

Is a mouthguard required in high school lacrosse?

Yes under NFHS boys and girls lacrosse rules, and the ADA summarizes NFHS/NCAA mandates for lacrosse. Confirm any state-association notes with your athletic director.

Can you wear a clear mouthguard in lacrosse?

Yes under the 2026 NFHS/USA Lacrosse boys update (no color restrictions, including white and clear), under the 2024 NFHS girls interpretations (clear, white, colored and graphics permitted), and under 2025–26 NCAA men's rules (clear or any other color). Still skip decorative non-protective attachments and, for women's NCAA field players, protruding tabs.

Are fang add-ons or charms legal?

For 2026 boys NFHS/USA Lacrosse play, mouth attachments that serve no protective purpose or are purely decorative are prohibited. For NFHS girls, spinning parts, charms and protruding tabs on field players' protectors are improper; printed graphics on a real protector can be legal. Follow your current rulebook.

Can lacrosse players with braces get AlienGuards?

Yes. Have your dentist take the impression or 3D scan instead of using our at-home kit, then ship it to us or email impressions@alienguards.com.

Which AlienGuard is best for lacrosse?

NanoBite, our slim 4 mm team-sports guard. Origin and Origin Pro are for combat sports, not lacrosse.