Features Enter your model number to make sure this fits. 1. Capacity 20-35L,Size 1:24*20cm(Folded),Size 2:33*16*47cm(open),Lightweight with high Volume 2. Adjustable expanding design of bottom and two sides pocket for reasonable storage volume needed 3. Coming in density compact nylon,quality Zipper buckle accessories for sturdy and durable use 4. Adapted waterproof fabric and foldable design,easy to carry with,ideal for climbing mountain,hiking,trekking,etc. Breathable mesh shoulder straps, bottle holder on the both sides,metal zippers,fine details 5.Ideal companion for your short or long journey trip or sport ,hiking,climb mountain ,camping, also could be daypack Description Product Description Specification: Material: High-quality Waterproof Nylon Type: Shoulder Bag/Backpack Shoulder Straps:Double Fashion Factor:Foldable Closure Type:Zipper Interior Structure:Zippered Pocket+Laptop Compartment Colors:Yellow/Red/Purple/Green/Blue/Black/Grey/Bright green Capacity:20-35L Size 1: 24*20cm Size 2: 33*16*47cm