Mountain Hardwear Fluid 12 Pack - in stock now. FEATURES of the Mountain Hardwear Fluid 12 Pack Soft, ventilated shoulder straps Close fitting suspension with on-the-fly compression and venting channels to prevent overheating Easy access hydration sleeve offers choice of routing tube over the shoulder or from lower pack, left or right Top fleece-lined zippered pocket for safe storage of sunglasses, smart phone or other valuables Zippered front pocket with key clip Stowable webbing belt adds stability when needed Stowable ice ax loops High visibility, safety reflective hits Two deep side pockets for water bottles or other gear