GravityFed is a professional review site where we, and our registered users, may receive compensation from companies whose products are reviewed. We are independently owned and the opinions expressed here are our own, or the opinions of our members.

Product: Expandable Knack Pack – Medium And Large

Brand: Knack Bags

April 30, 2020

Bottom Line

After trying out the Knack Pack for myself, the best way I can describe it is a jack of all trades, master of none. Travelers who make frequent, short trips will get the biggest benefit from this multitasking pack.

Field Notes

Read the full review

testing environment

The packs have seen a fair amount of use and abuse over the past few months. I have been using mine while shopping, hiking, and spelunking in Pinnacles National Park.


  • I love the way the pockets are organized
  • The interior fabric is easy to wipe down
  • The water-resistant exterior fabric has excelled at repelling dirt, moisture, and stains
  • The pack’s durability has been one of its best features


  • The medium size does not include a hip belt to help distribute weight
  • The back panel performs poorly in hot weather
  • Certainly not ugly, but I wouldn’t hesitate to call it boring