CLOSEOUTS . Anything but a point of weakness, Mountainsmith's Achilles backpack has a lightweight VX-21 nylon exterior that's strong and durable to resist abrasions as you climb or bag peaks. Water-tight zip lid compartment keeps map and snacks handy Breathable mesh padding keeps you cool and comfortable Compression straps distribute load evenly Top-loading Drawcord side pockets Tool loops Internal frame Fits torsos: 17 to 19-½â Size: Approx. 24-½x13x9-½â Capacity: 3100 cu.in. Weight: 3 lb. 10 oz. Fabric: VX-21 nylon CLOSEOUTS . China.