The F3F is derived from our popular F3M... We took a pack that the Army Times voted as their best pick for a 3-day pack, and that a soldier from the 7th Special Forces Group telephoned from Afghanistan just to tell us how much he liked it... and then we made it better. The F3F has a new zip-around top opening, with optimizes it for PRC-117 type radios, MOLLE/PALS webbing up the sides in place of the F3M's side pockets, and two front pockets. This is a great all-around 3-day pack, but we named it the FAC Track because it is the best-in-class pack for Forward Air Controllers, and we think they're good guys to have on your team. Major features include: Upper back wall radio rack with 3 large antenna portals. Padlock webbing tie-points all over the pack. "Shooter's harness" with 3D mesh is vertically adjustable for varying torso lengths, and is both thinner for shooting, and more comfortable for heavier loads. Numerous small pockets and organizers -- so you can always go right to what you're looking for. Has both a plastic framesheet and contourable internal aluminum stays. Handles on 3 sides make it easy to pick the pack up, especially when retrieving it from your trunk. Five hydration compatible pockets.