08001A/ Expandable Tactical Backpack Description: Material: Heavy-duty 600D PVC · Capacity: Up to 2,470-cu. in. capacity, 40/50L capacity. · Type: Softback · Use: Camping & Hiking · color: as catalog · size: 14.5″ x 21″ x 8″ · 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. Main compartment is 19 x 13″ and expands from 5″ to 10″ to accommodate extra vital assault gear to complete your mission. 08002B/3 Day Expandable Backpack Description: l Constructed of 600 denier polyester with vinyl backing l Large expandable main packing compartment l Organizer pocket l Side parachute clasps l Easy grip zipper pulls l Back support belt with parachute clasps l Whether it’s a long hike, an overnight trip, or a weekend getaway, the Expandable Backpack will fit your needs l Extra-large, expandable main packing compartment l Easy-grip zipper pulls l Back support belt Size: 20 1/2″ x 15″ x 7 3/4″ – 12 3/4″ WHEN FULLY EXTENDED Volume: 3920 cubic inches Weight：3 lbs; 08002A/3 Day Expandable Backpack Description: l Constructed of 600 denier polyester with vinyl backing l Large expandable main packing compartment l Organizer pocket l Side parachute clasps l Easy grip zipper pulls l Back support belt with parachute clasps l Whether it’s a long hike, an overnight trip, or a weekend getaway, the Expandable Backpack will fit your needs l Extra-large, expandable main packing compartment l Easy-grip zipper pulls l Back support belt Size: 20 1/2″ x 15″ x 7 3/4″ – 12 3/4″ WHEN FULLY EXTENDED Volume: 3920 cubic inches Weight：3 lbs