Ultra-Sil Dry Day Backpack | Sea to Summit。If you want a super lightweight, compact bag to carry your basics, the Sea to Summit Ultra-Sil travel day pack is a great option, whether you need a summit pack while hiking or a travel tote for town. Color: Atoll Blue Features Made with ultralightweight, high-strength 15-denier Ultra-Sil Nano nylon fabric Siliconized nylon fabric is water-resistant and aids in easy packing Exceptionally compact packable design folds down to the size of an egg Asymmetrical zipper design makes for a tiny packed size Bar-tacks at stress points provide added strength Technical Specs Best Use Travel Bag Style Backpack Gear Capacity (L) 20 liters Gear Capacity (cu. in.) 1,642 cubic inches Carry-On Yes Raincover Included No Material(s) 15-denier Ultra-Sil Nano nylon Dimensions 18.9 x 11 x 7.9 inches Weight 2.5 ounces Gender Unisex