Durable. lightweight construction. Vented adjustable stretch waist strap for a super secure fit. Integrated CE 1621-2 Level 2 Koroyd back protector. Mesh covered 3D foam back panel construction for support and ventilation . Pre-shaped. lightweight perforated foam shoulder strap construction provides comfort and ventilation . Easy access waterproof zipped pocket and Removable Tool Roll. Hydration compatible . Durable. splash proof base and Quick release pad carry straps . Adaptive Helmet Carry System for full face and standard helmets. 15 litre capacity .