The Versatile, 3 in 1 FSP. The bag you didn't know you need. Starts life as a nut-ruck/fanny pack, coverts in to a plate carrier dangler and finally in to a backpack. This version of the FS Pack is made with Trelleborg Hank. Hank is a very durable material with high abrasion resistance, water resistance, fire resistance, that is light weight and flexible.
This pack is extremely water resistant, but may leak if fully submerged.