Castelli 3t arm warmersthis arm warmer is part of castellis 3t collection and is made of thermoflex a technical fabric which provides maximum warmth stretch and breathability the anatomic cut gives a close fit that doesnt constrict while the silicone gripper elastic holds the arm warmer in place featurestechnical thermoflex fabricanatomic cut for a close fitsilicone gripper elasticweight 72gbuycastelli clothingfrom chain reaction cycles the worlds largest online bike store