Nike Max Intake Mouthguard - Adult Breathe deep with the Nike Max Intake Mouthguard. This sculpted, dual-density, dual-shot mouthguard features a load of technologies to improve comfort and performance. The low-profile and patented O-Flow breathing channel enhances respiration. Drainage Channels and stabilizer blocks make this mouthguard very comfortable to wear. Two-tone for style. Strap receiver. Includes a $12,500 manufacturer dental warranty. One size fits most.