Reflective heat transfer design for 360 degree visibility. Reflective candlepower rated 500CD/LUX.;Compression technology warms and stabilizes lower leg muscles and reduces fatigue during workouts.;hDc Moisture Management Technology is all about cool and dry. 6-thread flat-lock technology for strength at the seams. 50+ UV skin protection.;85% nylon/15% spandex. Includes one pair;Fits calf size 16 to 17 inch.