Naturehike Rainproof Lightweight Packable Backpack for Climbing Camping Backpacking Cycling Bicycle Travel Airplane, 18L 25L Ultralight Foldable Small Daypack for Men Women 100% Satisfaction -- We stand behind our products. If you are not completely satisfied with this backpack for any reason, simply write us & receive a full refund. BEST QUALITY MADE - Made with high quality water & tear resistant 30D nylon material. ZIPPERS : YKK sealed with silicone for 100% waterproof / Fine nylon lines stitching provides durable strong / Adjustable Shoulder Straps: Breathable tear-resistant nylon for comfortable and never breaks worry . ALL PARTS WELL MADE, quality is far better than most polyester or 210T nylon backpacks on Amazon. RELIABLE WATERPROOF - Silicone coated nylon fabric features PU2000mm water resistant, all zippers sealed by silicone coating can be fast open and close. Can keep your belongings dry even in heavily rain or water play games. If you are looking for a 100% waterproof guarantee backpack, this is a great choice. Unlike most backpacks without no protection on zipper promise waterproof, WE ARE SERIOUSLY, no cheating!!! LIGHTWEIGHT(4.2oz) and ROOMY(18L) - Main pocket is large enough to carry what you need when you are in outdoor or travel. Outer pocket & Inner zippered pocket great for quick access such as guide books and valuables items.Two large side mesh pockets for water bottles or umbrella. Size:17 x 10 when unfolded and collapses to 4.7 x 2.7 when folded. MOST COMFORTABLE - Padded should straps relieving pressure even you carry heavy inside, breathable mesh keeps cool and dry in wet weather, adjustable buckles perfectly fits your back to most comfortable way, Naturehike backpack guarantee you feel the easy and relaxing breeze when wearing it. GREAT for MANY USE - This a "sea to sky" backpack for both women and men, GREAT FOR TRAVEL(no matter beach, water sports, rain forest, wet weather countries..... ) OUTDOOR ( camping hiking cycling mountaineering climbing snow skiing....) DAILY ( school gym swimming sports-bag office gift choice...) & more, ONE BACKPACK for any weather any place. <span class="a-text-bold">Main pocket</span> is large enough to carry what you need. <span class="a-text-bold">Outer pocket</span> is great for quick access. <span class="a-text-bold">Inner pocket </span>which doubles as the storage pouch is perfect place for valuables belongings. <span class="a-text-bold">Two large side mesh pockets</span> for guide books, water bottle or umbrella. Weight: 0.26 lbs-18L; 0.38 lbs-25L Capacity: 18L/ 25L Compact Size: 4.7x2.7 inches-18L; 7x 3.1 inches-25L Unfold size:16.5x9.1x6.7 inches-18L;18.9x10.2x7.5 inches-25L 1 x Naturehike 18L or 25L Packable Backpack 1 x Attached carry bag