KUHL L/S Base Layer Performance T Shirt Size XL Outdoors Hiking Valiant Wool KUHL Long Sleeve Performance Base Layer T Shirt, possibly the Valiant. Size XL. Black. Thumb loops. Outdoors, Gorpcore, Hiking. In excellent, preowned condition with no flaws noted. No care/materials tag. Could be a wool blend. Measures approximately 24" pit to pit, 29" shoulder to hem.