$25 off orders over $79 + free shipping with rebate. Promo code: SPRING25The same top scientists who work on NASA textiles have developed a brand-new slipper for us Earth-bound types. The Outlast Memory Foam Slippers for Men regulate their own temperature: when feet get too warm, they absorb heat. When feet get too cold, they return the heat. Soles are made from heat-sensitive memory foam to cradle and contour your feet for a delightfully customized fit. Available in Black, Men's size Small (6-7).