- Cold Flow System™️ keeps water cold for 3+ hours- HydraPak®️ IsoBound™️ 1.5L 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 - 24 ounce Standard and Wide Mouth Hydro Flask bottles- Deployable, adjustable gear and compression straps- Dual zippered hip belt pockets- Internal organization for tools, snacks, keys and other essentials- Soft-lined media and sunglass pocket- Bike light attachment- Reflective logo Hydroflask Hydro Flask Down Shift Hydration Pack - Black