When temperatures drop below 32º F, this portable unit turns any backyard into an ice rink for parties, skating or hockey practice. It is very easy to assemble; no tools are required. Rink is ready to use after two to three consecutive days of freezing temperatures. Design accommodates backyards with unlevel terrain and landscaping obstacles. In case of a thaw or rain, the frames locking system keeps water inside the rink. A patented rigid PVC frame protects the liner from skate and shovel cuts; vinyl liner protects grass underneath. UV protected. Instructional video and vinyl repair kit included. (Blue and red lines mark hockey zones just like professional ice hockey rinks.) Average ice thickness is 2 1/2 inches. For ages 4 and up. Made in Canada. The manufacturer has confirmed that this item meets U.S. Federal toy safety standards for lead. 22' W x 33' L. (70 lbs)