Are Sisu mouthguards safe for rugby?

Yes. Sisu mouthguards are approved for contact sports including rugby. The perforated design might look less substantial than a traditional boil-and-bite guard but the thermoplastic material is engineered to absorb and distribute impact effectively. They are used across a wide range of contact sports at club and elite level.

Can Sisu mouthguards be remoulded?

Yes. One of the practical advantages of the Sisu design is that the thermoplastic can be remoulded multiple times by reheating in warm water. This means if the initial fit isn't right, or if your teeth change over time, you can refit the guard rather than replace it.

Are Sisu mouthguards suitable for players with braces?

Yes, SISU mouthguards are suitable for players with braces, but they require specific fitting protocols. Because SISU guards are ultra-thin and fully remoldable, they are an excellent choice for athletes whose teeth are continually shifting during orthodontic treatment.You must use dental wax or aluminum foil to cover the brackets during the fitting process. If you do not create this barrier, the pliable material will form a vacuum-tight seal over the brackets, making the guard extremely difficult and painful to remove.Because of the risk of damaging brackets during the molding stage, it is highly recommended to have your orthodontist assist with the initial fitting.

Where can I buy Sisu mouthguards in the UK?

Rugbystuff.com stocks the full Sisu range with same-day dispatch on orders placed before 3pm, seven days a week. Free UK delivery applies on orders over £100.

What is the difference between Sisu 3D and Sisu Max?

The main difference is in construction and thickness profile. The Sisu 3D uses a variable material thickness - 1.0mm on the inside for comfort and 2.0mm on the outside for protection - with a pre-formed shape that makes fitting more accurate. The Max uses a uniform 2.4mm thickness throughout, giving a higher overall level of impact absorption. Both are solid options.

SISU Mouthguards

Sisu mouthguards take a different approach to protection. Rather than building up bulk, Sisu use a perforated thermoplastic material that moulds tightly to the teeth and

About Sisu Mouthguards

The core of the Sisu range is the material. Sisu guards are made from a perforated, non-compressed thermoplastic that sets around the individual contours of your teeth when moulded - producing a fit that holds tightly without needing extra bulk to stay in place.

The Sisu 3D is the thinner of the two options at 1.0mm on the inside, 2.0mm on the outside, designed for players who want the least possible interference with breathing and speech. It's a popular choice for backs, scrum-halves, and any player for whom communication is a regular part of their game.

The Sisu Max adds more material at 2.4mm for increased impact absorption, making it better suited to forwards or players in high-contact positions who want more protection without stepping up to a bulkier guard.

If you're comparing Sisu alongside other brands, our full rugby mouthguards collection also includes Opro and Safejawz.