Castelli thermoflex arm warmerthe perfect addition for those cold rides chilly mornings or frosty cyclocross races the castelli thermoflex arm warmers will be more than up for the job thermoflex garments keep you warm and comfortable whilst being highly breathable featuresmaterial 85 nylon 15 elastanethermoflex fabric for soft warm stretchy comfortmicofibre gripper wristsilicone gripper for upper armsublimated castelli word mark on right side onlyweight 79g pair largebuy castelli c