TECH-SPECS 1000D Cordura on base and harness 420D nylon rip-stop construction Reflective panels on harness Reflective print on rear Hypalon abrasion resistant reinforcement Superspace 5mm airspace fabric YKK water resistant zips 20-litres (1200cu in) capacity DIMENSIONS: 470(h) x 280(w) x 150(d) mm / 18.5(h) x 11.0(w) x 5.9(d) ins. WEIGHT: 1150 Grams Optional Kriega Back Protector Insert MD 200-4932 (sold separately) Optional Kriega 3 Liter Hydrapak + Tube 200-4906 (sold separately)