Don't try to put these knee warmers in a box because Castelli crafted this versatile design with cold days and long rides in mind. These Pro Seamless Knee Warmers are strikingly warm without causing overheating, and their lightweight, seamless fabric promotes moisture management and eliminates irritation. Pull on a pair over your bib shorts and ride through the weather until the sun comes out, when you can strip these bad boys right off again.