Maximum thermal protection & body-mapped comfort in a long-sleeved base layer tuned for the coldest most demanding winter riding conditions. Building on our protective Winter LS Skin Layer the Ultraz edition turns up the warmth & windblocking capabilities even further with its wool-blended knit. We see this as the ultimate defensive first layer in the most challenging winter conditions as it goes into overdrive at the core level to keep you dry & your temperature stable. 50%PP 31%WO 10%PA 6%EA 3%CF