The Revolutionary New Zip-Up Compression Socks Relieve Pain, Swelling, And Varicose Veins. The Pinch-Resistant Zipper Makes Zip Sox A Breeze To Put On And Take Off. Made With A Breathable Nylon (90%) And Spandex Blend That Allows Them To Be Worn With Any Type Of Shoe. The Soft And Comfortable Design Fits Every Size Foot.