Foot Undeez feature four-way stretch, breathable nylon lycra spandex upper and 5/8" one-sided plush elastic. The two sole patches move independently and pads are securely sewn with stitching both on the edge and interior.
XS fits ladies 4-5
S fits ladies 6-7 or mens 4-5
M fits ladies 8-9 or mens 6-7
L fits ladies 10-11 or mens 8-9
XL fits ladies 12-13 or mens 10-11