This boot cover is athletic meets luxurious meets healing beautifully! It is soft, stretchable, lycra similar to Lululemon. With our newly designed insert to be up against your leg to assist in wicking away sweat and stop the chafing which comes from wearing a boot in the summer time. The leg sleeve may look a little funny - it feels amazing. Just tuck the fabric extension inside your boot for extra comfort! When ordering, select “tall” height unless your boot measures 12” or less.