Cold Flow System keeps water cold 3+ hours HydraPak IsoBound 1.5 L insulated reservoir High-flow HydraPak Blaster Bite Valve self-seals after each sip HydraPak Plug-N-Play connect system for convenient refilling Dual stretch bottle pockets fit 12 oz – 24 oz bottles Adjustable compression straps Two zippered hip belt pockets Internal organization for tools, snacks, keys and other essentials Soft-lined media and sunglass pocket