Shoei J-Cruise II & GT Air II Center Pad Replacement center pad for the Shoei J-Cruise II and GT Air II helmets. Center pads are only interchangeable within shell sizes. The J-Cruise II and GT Air II each use 4 unique shells. Both helmets follow the same shell breakdown: Shell 1: Corresponds to helmets in size XS and SM Shell 2: Helmet size MD Shell 3: Helmet size LG Shell 4: Helmet sizes XL and 2XL OEM Pad Thickness: XS: 13Mm SM: 9MM MD: 9MM LG: 9MM XL: 9MM 2Xl: 5MM