The Sling Backpack is constructed of American cowhide and is designed in a slime shape for ease of movement. It includes an ambidextrous Standard Holster designed by Mernickle Holsters. It has been tested with the M&P 9mm extended mag, Heckler Koch VP9 full size, Sig Sauer P320 C, Glock 19 compact, and Sig P365. The overall bag size is 12 Tall x 8 Wide x 2.5 Deep and the gun compartment size is 7 Wide x 10 Tall.