15L Hiking Backpack -1.5L Water Bag- Outdoor School Bag Lightweight Backpack Waterproof with Helmet Mesh Durable Daypack for Hiking, Traveling & Camping Made of ultralight water-resistant and tear-resistant nylon fabric;Special hole design for max water bag capacity of 2L (NOT included) Adjustable shoulder strap, chest strap and waist strap to fit your need;Reflective strips for safe riding at night Mesh and poriferous EVA design on the back for maximum breathability and comfort Detachable pouch for store your cellphone. Suitable for outdoor activities like cycling, camping, mountaineering and hiking, etc Package included:1 x Bike Shoulder Backpack;1 x 1.5L Water Bag;Lifetime Warranty;7-15 days shipping date with tracking number