There are two musical acts named Knapsack.
These are photos from concerts where Knapsack played, so they may be of other bands that played the concert as well.
The Wrecking Ball Aug 8 - 9, 2015 Atlanta, Georgia, United States Uploaded by Owllelujah
Knapsack / Beach Slang / The Hotelier May 4, 2015 Cologne, North Rhine-Westphalia, Germany Uploaded by I Loooose
Groezrock 2015 (Day 1) May 1, 2015 Meerhout, Flanders, Belgium Uploaded by I Loooose