Scorpion Exo-R1 Air Cheek Pads Sizing: These 3D sculpted cheek pads have various thicknesses and contours to provide a snug, track-oriented fit Interchangeable only within shell sizes: Shell 1: XS, SM, MD Shell 2: LG Shell 3: XL, 2Xl, 3XL See Resources tab for further size information Features: Replacement cheek pads 5mm thinner than regular cheek pads Airfit pump for the perfect fit Moisture wicking Antimicrobial Fits Scorpion EXO Exo-R1 Air Helmets