FatBoy Outdoor FatBoy, Jukka Setälä Finally. . you can lounge outside! Made of ballistic nylon which makes it more durable in the outdoors which is also coated with a UV protectant. FatBoy Outdoor is water resistant, but not waterproof, so we still suggest protecting your product from damaging weather. Fatboy Outdoor is 5 inches larger in length than the Original and it does have oversize grommets and straps for lugging, or you can hook the straps into the grommets to make a better back rest for lounging. A perfect compliment to your home, this will complete your outdoor space.