The Sea To Summit Pack Liner 90L is an indispensable waterproof accessory designed to fit backpacks and duffel bags up to 90 liters in capacity. Its durable 70D nylon with a waterproof polyurethane coating, reinforced seams, and a reliable roll-top closure effectively shield your gear from rain and moisture. This versatile liner accommodates a wide range of items, boasts a bright interior for easy identification, and can be securely anchored inside your backpack. It's a lightweight, compact, and essential addition for outdoor enthusiasts seeking to keep their belongings dry during adventures in challenging conditions.