Reebok Delta Collection Survivor Backpack w/ Water Bladder Port - Pink/Safety Yellow Breathable PU ripstop / Dimensions: 17" x 11.5" x 4" Removable waist strap and sternum strap for a great custom fit Padded inner laptop sleeve and tablet sleeve. Front and back reflectivity. Side compression straps and front pocket with bungee system for secure packing Water bladder hole that can fit up to 16 Liters. Water repellant bottom.