WHO SAYS ADVENTURE HAS TO BE UNCOMFORTABLE? We love adventure and have raised our kids to love it too, but we also like to be comfortable, whether camping, at a festival, concert, baseball or any other sporting event. Our blanket has been designed to be a problem solver. The 2 big advantages are that the nylon side is waterproof in most situations and that the 2 layers are ultrasonically quilted together to prevent the surfaces sliding on each other. A secret weatherproof zipped pocket, stuff sack & the best quality premium fleece, are all a result of our desire to provide a product that meets a need with excellence. In some circumstances if water is allowed to pool on the non waterproof fleece side for several hours, some moisture may be drawn through the water resistant backing. Being machine washable is also a bonus. If for any reason you are unsatisfied, we offer a lifetime warranty because we believe in excellent service as well.