Details− Material:100% polyester with polyurethane coatingLining:100% polyesterWaterproof rating:W3 – Waterproof protection from light rainWater column pressure:8000mmMeasurements:H48 x W32 x D11cm / H18.8 x W12.6 x D4.3 inchesVolume:13 liters / 4.3 gallonsWeight:835 g / 29.5 oz. Features: Rolltop opening with snap compression, to be securely closed and fastened to protect from rain Signature carabiner closure Single main compartment Front pocket with coated zip Padded air-mesh back panel Side-access laptop pocket fits 16” device Adjustable padded backstraps Webbing carry handle Adjustable chest strap