MOUNTAINTOP Outdoor Hiking Climbing Clycling Canvas Backpack Daypacks Waterproof Mountaineering Bag M509 Shoulder Bag 25L Unisex Trekking Travel Bag Rucksack Size: 40cm(H)x29cm(L)*20cm(W); Large capacity of 25L, breathable S-type strap,mesh belt, 3D carrying system The upgrades one cancel the rainproof cover, and instead of a helmet protection cover. More protable for all the cycling enthusiasts. Quality fabrics: quality polyester fabric, water repellent, tear resistant, wear resistant, breathable and moistureproof, smooth and comfortable SBS zipper, YNS buckle-cold-resistant and securely; reflective strip design, higher safety factor for night; water outlet design, more humane, more convenient for travelling Large front pocket, multiple zippered side pockets, and multiple elastic bands