They stick to carpeted floors like glue! First introduced in 1988, these strips are great for learning cartwheels, lining up classes, directing traffic, obstacle courses and many other situations around the gym. The 4" wide hook and loop fastener sewn to a colorful vinyl strip is hemmed all around. No raw edges like other brands. They are sold in random colors in sets of 4 or 13. Ships via UPS. 8 feet long.