Arm muscles stay warm and active with compression technology - Protects skin from abrasions - hDc Moisture Management Technology is all about cool and dry - 6-thread flat-lock technology for strength 
at the seams - 50+ UV skin protection - 80% nylon/20% spandex Sizing (Measure around bent elbow) - S: 8-9.5" - M: 9.5-11" - L: 11-13", available as single sleeve and pair.