Removes in 10 seconds. Hassle-free fork seal protector. Keeps debris away from fork seals. Fewer blown seals. Multistrap velcro closure makes them easy to put on and take off. Easily removes to wash bike and Sox. Wont trap moisture. 4" fits 50 - 65cc bikes and pit bikes. 6" fits 85 - 450cc bikes. 6" Vintage fits 125 - 450cc bikes. 13" fits 125 - 450cc bikes. Sold in pairs.