Troy lee designs ace shortsdesigned with the grittiest xc riders in mind the ace line is built for performance the lightweight moisture wicking material feels tailored to your body and features all the technical components you need to get to the top of the climb first whether you prefer grinding out long rides or cruising easy trails the ace line is the premium gear that works as hard as you do read artscyclery com review of this productfeatures 4 way stretch highly durable 90 polyester