Trex 6304 One-Piece Step-In Full Coverage Ice Cleats, Large, Black, Pair, Ships in 1-3 Business DaysTested to remain flexible in temps up to -40°F (-40°C). Stretchable rubber construction won't break in cold temperatures, providing reliable everyday traction.Lightweight, easy to store and fits over any boot or shoe.TREX 6301 Replacement Studs (sold separately) are easily replaced by popping the old ones out and the new ones in. WARNING: Cancer and Reproductive Harm -- www.P65Warnings.ca.gov - Cancer:N/A;;Reproductive Harm:N/A