PremierPro Slipper Socks. Medium. Light Blue. Double Tread. Socks are made of a polyester blend with an elastic cuff for optimal comfort. Sizes are color coded and range from infant to bariatric. The unique tread pattern helps reduce the risk of slips and falls. Skid-resistant white PVC tread. Latex Free. UOM: 1PR/BG, 48BG/CS.