Big Agnes Impassable 20 L Pack

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The Big Agnes Impassable 20 L pack was built for long day hikes, lightweight outings and everyday use. Made for exploring in comfort, this pack has room for the essentials and won't weigh you down.


  • Contoured, anatomically curved back panel with body-mapped foam offers comfort, support and a precise fit with ventilation
  • Articulated Open Range hipbelt provides stability with flexibility for a secure, comfortable fit
  • Contoured shoulder straps with an adjustable sternum strap
  • Adjustable side webbing allows you to compress the pack volume as needed
  • Top-loading access with a zip closure
  • Internal 2 L hydration bladder pocket has a bladder hook and discreet tube routing port; hose keeper clip on the sternum strap keeps your water handy (reservoir not included)
  • Compartmentalized storage includes 2 L hydration bladder pocket, 2 stretch mesh side pockets, a front quick-stash pocket, 2 zip pockets with key keeper and organization pocket
  • Padded pocket with side access fits up to 15 in. (38 cm) laptops and has a mesh floor
  • Webbing and bungee cord loops on exterior of pack are ideal for stashing your trekking poles; exterior also features daisy chain loops for extras
  • Exterior has a top grab handle for easy transport
  • Made with recycled, GRS-certified, high-tenacity nylon MIPAN® regen robic with solution dye ripstop grid
  • The tough, lightweight fabric has a 1,500 mm UTS coating that increases tear strength and durability
  • Accessory raincover and 7 L trash can for collecting day trash or trail litter not included


View all Big Agnes Daypacks

Technical Specs

Best Use


Bag Style


Frame Type


Gear Capacity (L)

20 liters

Gear Capacity (cu. in.)

1,220 cubic inches


1 lb. 8 oz.

Fits Torso Length (in.)

16-22 inches

Fits Waist/Hips

28-54 inches


Recycled GRS-certified high-tenacity nylon MIPAN regen robic with solution-dye ripstop grid

Pack Access


Number of Exterior Pockets

6 + main compartment



Laptop Compartment


Fits Laptop Size (in.)

15 inches

Reservoir Compatible



20 x 8 x 5.5 inches




Contains recycled materials

4 reviews with an average rating of 4.0 out of 5 stars

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