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Arete 18


Product Description

Product Description

With its lightweight materials and reversible design, the Arête 18 is one of the most versatile packs we make.

With its lightweight materials and reversible, double-duty design, the Arête™ 18 is one of the most versatile packs we make.

When you’re not wearing it, it reverses into an insulated reservoir sleeve—perfect for holding your water supply steady inside a larger pack.

  • Ready for a quick hike? Just flip it right side out, and you’ve got room for snacks, layers, essentials, and 1.5 liters of water.
  • It's lightweight materials and packable design also make it an excellent travel bag that won’t add bulk to your luggage.
  • We updated this version of the Arête with additional pockets to keep your gear organized, along with a removable sternum strap. 

Features & Specs


  • Features: 1/4 turn - easy open/close cap, lightweight fillport, dryer arms, center baffling and low-profile design, patented Big Bite™ Valve, HydroGuard™ technology, PureFlow™ tube, easy-to-clean wide-mouth opening
  • Key pack features: Reverses into reservoir compartment, lightweight materials, highly compressible
  • Designed to carry:
    Headlamp, trail map, shed layer, food, keys



  • Pockets: zippered side
  • Compression: yes
  • Dimensions: 16.5 x 9 x 9 in
  • Claimed Weight: 11 oz
  • Recommended Use: hiking & camping
  • Manufacturer Warranty: Lifetime
  • Material: 100% ripstop nylon (240D)
  • Volume: 1100 cu in
  • Shoulder Straps: Air Mesh
  • Hydration Compatible
  • Reservoir Included: 1.5-liter (50-ounce) reservoir

Sizing Chart/Video

Sizing Chart

Hydration Capacity: 70 oz / 2 L

Total Capacity: 854 cu in/ 14L + 2L Reservoir

Total Weight (Pack and Reservoir): 0.62 lbs / 0.28 kg

Dimensions: 17 X 9 X 7 in / 43 x 23 x 18 cm

Torso Length: 13 in /32 cm

Empty Reservoir Dimensions: 70D Nylon

Full Reservoir Dimensions: N/A