Designed to fit inside of your pack, our Pack Liners help protect your gear from the outside elements. The pack liner is a 50 L or 75L , roll-top bag, made with waterproof material and taped seams to keep your pack's contents dry. Specifications: 50 Liters | 27" x 21" x 8" (71 x 53 x 20cm) | 3 oz - 86 g 75 Liters | 38" x 21" x 9" (98 x 53 x 23cm) | 3.6 oz - 100 g Material: Sil/PU Coated 40D Nylon Ripstop Features Taped Seams D-Ring for Hanging Roll-Top Opening Notes: Not intended for long term immersion underwater.