REI Co-op Signal 40 Pack

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The REI Co-op Signal 40 pack has several travel tricks up its sleeve to maximize your carry-on capacity, carrying comfort and security when you reach your final destination.


  • Slash-resistant, coated foam at front and bottom protects against slash-and-grab theft
  • Backpack strap can be buckled to fixed objects to discourage grab-and-go theft
  • Shoulder straps tuck behind the back panel in case you decide to check the Signal 40
  • Adjustable, padded messenger-style strap offers easy one-shoulder carry; strap hides away in a bottom pocket when not in use
  • Padded top and side luggage handles make it easy to snatch the bag off a luggage carousel or out of the overhead compartment
  • Padded laptop pocket separates laptop from main compartment, making it easier to get your laptop out for TSA
  • Laptop, main pocket and quick-access top pocket are all protected by weather-resistant stormflaps
  • Organizer panel in the main compartment helps you keep your passport, keys, cards and other valuables orderly
  • Padded back panel and shoulder straps offer carrying comfort; sternum strap helps stabilize the load
  • Side water bottle pockets help keep you hydrated
  • Zippered top pocket allows easy access to snacks, sunglasses or electronics
  • This item meets carry-on size restrictions for most airlines (size not to exceed 45 linear inches when adding L+W+H; this is subject to change, so check with your airline)


View all REI Co-op Travel Daypacks

Technical Specs

Best Use


Bag Style


Gear Capacity (L)

42.75 liters

Gear Capacity (cu. in.)

2,609 cubic inches

Number of Exterior Pockets

9 + main compartment

Laptop Compartment


Fits Laptop Size (in.)

17 inches






22 x 12.5 x 8 inches


3 lbs. 6 oz.



Frame Material

HDPE framesheet


From a Climate Neutral Certified brand

12 reviews with an average rating of 3.1 out of 5 stars

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