Liimited stocks at the moment but this is an interesting bag from Maxpedition. A few people have expressed an interest in the Versipack range but thought them a bit too small for their purposes.
Enter stage right - Mongo!

Enter stage right - Mongo!

Larger and features-enhanced version of Maxpedition® the famous Jumbo Versipack. The main compartment fits a letter size (8-1/2" x 11") pad. Multiple external loop fields for patches. Multiple attachment points for adding pouches & accessories. Oversized buckle / hardware for durability. Ergonomic design so bag sits comfortably on body. Three padded islands of breathable material for improved air circulation. Better For Right Side Carry.
# Main: 12" long x 4" wide x 9.5" deep with slip pocket, drawstring storm collar
# Front: 10" long x 6.5" wide x 1.5" thick with slip pocket, key retainer, 6" x 8" loop field, dual zipper opening
# Front slip: 9" long x 5.5" deep with 6" x 8" loop field
# Front sleeve: 10" long x 8" deep with 6" x 8" loop field
# Lid pocket: 9.5" long x 3.5" wide x 1" thick; internal zipper mesh pocket; 2" wide elastic
# Lid sleeve pocket: 10" x 8"
# Side A: 6" x 3.5" x 1.5" with slip pocket;
# Side B: 7.5" high x 3" diameter with cinch
# Rear sleeve(CCW): 11" wide x 10" deep
# Phone holster: 2.5" x 5"
# Waist belt: Concealable 52" max waist size w/ quick release
# Shoulder strap: 45" long; 60" max circumference, quick release, with 2" padded non-slip shoulder pad and integral Keyper