My wife had a women's Thermarest x-lite for 3 years that had a tendency to go flat with large temperature swings. She just dealt with it for the @150 nights of use it got. Lately it got a little exasperating. With no receipt and the full expectation of paying for a repair, I sent it back, as we had older pads as backup. It took a little over 3 weeks , but CD sent a brand new one, for no charge, back. We love the pads, so this is just a feather in the cap. Thumbs up to Cascade Designs.