Features - System for hydration pack - External Compression straps - Fits a 13 inch MacBook® - Adjustable, removable hip belt for stability - Sternum strap - Internal pockets to keep your gear organized - Internal attachment point for wallets and keys - Pen loop - Water bottle pocket Specs Materials (Outer material) 210D nylon twill , (lining) 200D Polyester Weight 2.14 lbs / 0.97 kg Volume 25L Dimensions (H x W x D): 18.9 x 11 x 7.5 in / 48 x 28 x 19 cm Strap Length backpack strap length (min): 64cm / 25.2in; backpack strap length (max): 92cm / 36.3in