Constructed of durable, green solvent-resistant polypropylene. For resinous/ epoxy floor coating installation. Mark-free installations,Check and tighten nuts if needed. Must use with safety shoes, Easy to adjust by hook and loop tape straps at toe and ankle. Fits over a size 11 US / 9 UK/42 europe. Spiked Shoes for Resinous Coatings, Epoxy Floor, Overlays, Cover Installation, Spiked Screeding Sanda,Ice Crampons, BLACK