This is an amazing shirt - so lightweight and stretchy that you hardly feel like you are wearing anything.  It is a great fit with woven panels in the right places to give flattering shape AND d3o shoulderpads which are positioned on this shirt to protect the rider’s shoulders on impact with the ground / objects, lessening the likelyhood of injury to the shoulders, collarbones and joints.
60% Polyamide, 35% polypropylene, 5% Elastane. d3o is machine washable at 40 degrees.  One size fits all.