The Altura Thunderstorm City 30 Backpack is designed to hold all you need in an urban environment, from the daily commute to a weekend s sightseeing adventure. With a tough, durable and waterproof construction you can be sure your possessions will be safe and dry no matter what the conditions.Durable, waterproof construction protects your items in all conditionsLarge 30 litre capacity provides ample storage solutionsDraft Venting back system keeps you coolRemovable padded sleeve isolates and protects laptops/tabletsLight attachment points and 360 degree reflective details improve safetyFully waterproof to level IPX6Roll top closurePadded laptop sleeve (removable) fits 15 laptopInternal zipped pocket and key loopLight attachment pointsChest and waist strapDraft Venting back systemGrab handle360° reflective detailsWeight: 600gDimensions: 47 x 27 x 15cmConstructed from polyester ripstop fabric 600D with TPU coating, this backpack is incredibly durable and fully waterproof to level IPX6. The roll top closure adds an extra level of protection and security. The rear of the pack features Altura's Draft Venting system which allows air to flow between the bag and your back to keep you cool and comfortable. For improved stability the pack includes chest and waist straps. As well as an internal zipped pocket and key loop there s also a removable padded laptop sleeve which fits laptops up to 15 . Together with light attachment points the backpack features 360 degree reflective details to improve visibility in low light conditions.