Besides the BC Mesh baselayer which is designed to keep you cool and dry, this model keeps you warm and dry, even in the wet! Again we are using the Italians to circular knit this wonder. With a nice high neck to keep the draft out, the polypropylene based shirt, will keep you warm and dry for the classics or your local cold ride. Excellent of course to ski, run, just be warm and dry in! Like the BC Mesh baselayer, this comes in 2 size XS/S and M/L. Fits snug on purpose.