Stone Island’s outerwear collection is known for its durability and construction, but those qualities also translate well for the brand's travel bags. The Stone Island Drybag might come in bright colors, but it's one tough carry-all. Constructed in ultra-durable PVC, the bag is waterproof and has an air-tight seal. It comes in green, orange, yellow, and black. To show how exactly durable this bag is, check out the video above. Visit the Stone Island website to Buy It Now for $278.