This Pack is a lightweight, breathable backpack, features a double stability system for comfortable wear during outdoor activities like cycling, running, or hiking.The shoulder backpack storage can hold soft water bottles energy gels or other supplies. There's also a zippered compartment on the shoulder strap for small items like cards, phone, etc.Cycling bag water bag is made of nylon fabrics, waterproof, lightweight, thin, comfortable, quick drying, and resistant to wear and tear, making it great for long outdoor adventures.It features an adjustable chest system that can be quickly disassembled and adjusted for tightness making it easy to use, so to help you release your burden or pressure.Additionally, there are external hanging devices where you can hang warning lights; it also has a mountaineering stick mounting device with elastic rope design for stable carrying without shaking.Backpack Running Hiking Men Women Adult. Pack for Skiing Water Backpack Daypack. Cycling Backpack Bike Backpacks Biking Backpack. Lightweight Travelling Water Bladder Bag Riding. Climbing Outdoor Sports Mountain Bike Storage Bag.