Move freely and carry everything you need for a day on the trail. Head out for an all-day trail run or a technical hike: the 5L backpack efficiently carries your full kit. and comfortable, this bag makes sure you're fully prepared for several hours of active adventure. Dynamic Comfort: This pack is designed to let you move faster in more comfort, with a harness construction, open 3D mesh, and adjustable stretch TwinLink sternum straps. Quick Access: Front storage lets you quickly access apparel, lateral main storage compartment holds hydration, and stretch pockets keep on-the-go items within reach. Multi-: that lets you do more than one thing: take along extra gear like flasks, water bladder,appreal, poles, or ice axes Specificaiton: : Item:Running Hydrattion Bakcpack Model:C9102# Capacity:5L(11pcs compartments) Mesh: Polyester Fabric 1:Nylon Fabric 2:85% nylon,15% Colour: black Material: polyester fiber + nylon Package Contents: 1 x backpack 2 x Water bag Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.