Expanding Field Backpack

Cactus Jack Field Expanding Backpack has a main compartment that is 19 x 13" and it expands from 5" to 10" to accommodate extra gear. 

• Main area expands from 5" to 10" to fit more gear
• 2 accessory pockets
• Water bottle mesh pocket
• 2 electronics pockets on shoulder straps
• Removable waist belt
• Daisy chain holds rain gear, etc.
• Up to 2,470-cu. in. capacity, 40.48-liter capacity