The rolltop construction includes a unique expansion zip access that allows the main bag to fold open so you can easily and quickly access your stuff. The hardwearing 420 denier nylon fabric provides durable protection for kit, wherever your day takes you. Padded back system always keeps you comfortable on the move. Two external bottle pockets for keeping hydration close to hand. Multiple internal storage options for a variety of kit, including a dedicated laptop sleeve that will fit a 16 inch device. Extra storage in front pocket with YKK zip.