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 30-litres (1800cu in) capacity; DIMENSIONS: 490(h) x 300(w) x 210(d) mm / 19.3(h) x 11.8(w) x 8.3(d) ins.; WEIGHT: 1600 Grams Optional Kriega Back Protector Insert MD 200-4932 (sold separately) Optional Kriega 3 Liter Hydrapak + Tube 200-4906 (sold separately)