Featuresr 15l cycling backpack made of ultralight water resistant nylon fabricr special hole design for water bag not includedr adjustable shoulder strap chest strap and waist strap to fit your needr with whistle design on the chest strapr ergonomic design on the back for maximum breathability and comfortr reflective strips for safe riding at nightr rain cover included and mesh cover to put your helmetr suitable for outdoor activities like cycling rock climbing and hiking etc