Shaped to fit seamlessly with your pack, the Ultralight Pack Liner is designed to protect the gear you carry inside your pack from the weather outside, giving you extra peace of mind in wet and rainy conditions. Features: – Roll-top waterproof closure- Waterproof-coated fabric and seams- Rectangular shape for efficient packingSpecs:Medium – Volume: 58L, Dimensions: 24.02H X 14.57W X 12.2D IN. Perfect for50-70 liter packsLarge – Volume: 76L, Dimensions: 28.35H X 15.35W X 13.39D IN. Perfect for 70-100 liter packsFabric: Bluesign approved 100% recycled 40D high-tenacity nylon