We build them in two sizes from trusty waxed canvas at our shop in Duluth. One has a 5in gusset and is a classic daypack size, the 7in is deeper, perfect for boxy or bulky items. All have a sleeve at the back for storing flat stuff, you get the choice to have it padded or not. The zippers go all the way down allowing the pack to open wide. Interior pockets provide organization. Available in Heritage Black as well as Field Tan, the North Bay Daypack lets you choose which environment to blend in with, and which you'd like to carry with you.