Come and see our amazing products! It is made of waterproof Oxford Cloth, the breathable shoulder strap is pretty wide to spread the weight. It is waterproof, durable, lightweight, and thoughtfully designed to integrate into your every-day business or casual wardrobe. The ultralight backpack is fully adjustable for comfort by shoulder straps,chest straps and waist straps. This multifunctional backpack can be used as a casual daypack, travel backpack, outdoor pack for hiking, cycling, camping and mountain climbing. Its size is 15 3/4" * 8 2/3" * 4" . Price includes shipping to CA. Quantity over 3000 based on sea freight. Pls confirm further with us if any query about packing info, inventory status and time schedule.