Its tight fitting properties make it far more comfortable when your working hard … Cycling Base layers: Fit Like everything in road cycling, a performance base layer should sit close to the skin. Take the best of merino wool and polyester, smashed together to create an … They dry incredibly slowly compared to other options, and cause a chill if you stop sweating and remain in your clothing. The Smartwool 250 is a midweight base … Stay away from 100% cotton base layers. Implementing new and innovative technology, Patagonia brings us a seamless base layer that feels unbelievable. The Smartwool Merino 250 top fits true to size, too: The profile is narrow but not too tight, so you can easily layer it under a fleece, down jacket or vest. If cotton is only a small …