Hydration backpack pack volume 2 litre model 2015 material 70 d ripstop nylon suitable for women men carry handle top outside pockets side pocket mesh side pockets internal pockets hydration bladder compartment special feature reflective print fastener zip weight 025 kg height 38 cm width 22 cm water reservoir source widepac water reservoir technologies source taste free source grunge guard source glass like drinking valve source helix please n