Roll-top backpack - Easy-to-use bag. Waterproof roll-top closure. Metal buckles that can be used with gloves. Quick access to zipped front pocket. Multi-purpose rings. 2 outer bottle holders. Padded compartment for laptops up to 15.3 inches. Reflective strips. Breathable back panel. Adjustable straps. Water repellent. PVC-free. Detachable label. Marking surface: 17x26cm.