Osprey’s Hydraulics™ Insulated Delivery System is engineered to keep your water flowing in subzero conditions. It retrofits on to any Hydraulics™ reservoir to create a hydration system that combats the cold temperatures encountered during winter activities. All parts are BPA-free, phthalate-free, lead-free, guaranteed. All materials are certified food safe according to FDA and EU regulations.

• Provides insulation in cold and hot weather
• Heat reflective closed cell foam sleeve
• Zippered foam pad for bite valve
• Retrofits to any Hydraulics™ Reservoir