Description Product Description Sentinel Backpack (12.5"w x 18"h x 8"d) - Durable, Water-resistant 1000 Denier nylon - Padded backpack strap for comfortable carry with added sternum strap - Two front pockets - Top pocket (10"w x 7"h x 1.25"d) - Zippered netted pocket - Fleece-lined open pockets for electronics - Bottom pocket (11"w x 12.5"h x 2"d) - Pen Holders - Key organizer - Open pocket (2"w x 5"h x.75"d) - One netted zippered pocket - Elastic strap to secure flashlight or pocket knife - Large zippered pocket (9.5"w x 10"h) and open pocket (9.5"w x 8.5"h) - Main Compartment (12"w x 18"h x 6.5"d) - Three zippered pockets on top flap (11"w x 5"h, 12"w x 5"h, & 12.5"w x 6"h) - Laptop compartment with Velcro® closure - Back zippered pocket can be used for an internal hydration compartment - Backing offers heavy padding, netting for comfort and ventilation - Tan