 It combines two layers of foam, including my proprietary MyPillow foam and a patented impact shell made from U.S. soybeans. My three-tier cushioning system is going to help relieve pressure points, provide that micro-support you need for all-day comfort, and help prevent fatigue. Not only that, my slippers are made with high-quality leather and a premium indoor-outdoor sole that make them extremely durable. I personally guarantee they're going to be the most comfortable slippers you'll ever own.