Timbuk2 Spin Messenger Bag Classic satchel style messenger with a durable ballistic nylon exterior and lightweight nylon liner interior Secure hook and loop closure allows quick access to your goods Timbuk2 memory-adjust cam buckle on the shoulder strap eliminates the need for daily fit adjustments Watertight flap construction keeps water out Slash pocket on the back wall fits most 13"/15" MacBook's in a sleeve (Junior and Senior respectively) Classic satchel style messenger with a durable ballistic nylon exterior and lightweight nylon liner interior Secure Velcro closure allows quick access to your goods Timbuk2 memory-adjust cam buckle on the shoulder strap eliminates the need for daily fit adjustments Watertight flap construction keeps water out Slash pocket on the back wall fits most 13"/15" MacBook's in a sleeve (Junior and Senior respectively)