Osprey 4 Season Insulation Kit


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Osprey 4 Season Insulation Kit

Keep water flowing in cold winter months and cool in the heat of the summer—this four-season insulated kit is ideal no matter the season. Featuring closed-cell foam, a heat-reflective coating, a removable bite valve sleeve and easy-carry attachment loops. Fits reservoirs up to 3 liters. *Compatible with Hydrapak reservoirs produced after 2013.


  • Heat-reflective, closed-cell foam sleeve offers maximum insulation
  • Tailored insulated reservoir sleeve with attachment loops
  • Insulated hose protected from direct sunlight
  • Zippered bite valve insulation sleeve helps keep mouthpiece free of ice
  • Removable bite valve sleeve for summer use
  • Reservoir must be purchased separately


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