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Koosah Hydration Pack


Koosah is the all-purpose, minimal pack for moving fast and light. Water weight is carried low, for increased stability and upper body freedom of motion. Side stabilizers comfortably hug the pack to your body. Koosah includes Mazama’s premium 1.5 L (50 oz.) taste-free reservoir and newly added insulated drink tube kit for all your winter adventures; great for hiking, cycling, running, and skiing.

Pack Specs

  • Sizes: One size
  • Pack dimensions: 15 x 9 x 1 inches
  • Fluid Capacity: 50 oz (1.5 Liter) reservoir
  • Cargo capacity: 1.5 Liter
  • Weight: 14 oz. (400 grams)
  • Waistbelt range: 20 - 48 inches

Pack Features

  • Low profile, C.O.G. (Center of Gravity) geometry
  • Stabilizer wings with easy access pockets
  • Strap stow system--no loose ends
  • Left or right drink tube routing
  • Insulated reservoir compartment--keeps fluid cool or warm
  • Drop-in loading for reservoir and drink tube
  • Expandable cargo compartment
  • Blinker light attachment
  • Adjustable sternum cord system

Reservoir System Features

  • Wide mouth fill port for easy fill-up and cleaning
  • Lock-and-go leakproof fill port closure
  • Taste-free, USA-sourced film
  • Low profile bladder with center baffle
  • High flow bite valve
  • Drink tube clip
  • PVC/BPA-free
  • FDA food-grade materials

Reservoir System Specs

  • Capacity: 50 ounces (1.5 Liters)
  • Dimensions: 13.5 x 8 in. (empty)
  • Weight: 6 oz. (170 grams)
  • Drink Tube: 1/4 in. ID x 3/8 in. OD x 39 in. length