Evolved baselayers available today often incorporate fabric blends that are complementary, yet individual fabrics are are often purposefully applied in targeted locations to meet specific heat or protection zones. The Sportful Sottozero Long Sleeve Base Layer is made from a wool and polyester blend to give you the best properties of both. The soft wool provides the best warmth for cold days in the saddle while the sleek polyester helps wick sweat away, preventing moisture build up that can lead to a chilled core.

Under the armpits and on the lower back we find more specific use of a polyester fabric with 3D textures. These areas have been identified byt greater perspiration and heat accumaltion. The underarm area is obvious enough, but the rear of most bib shorts and big tights covers the lower back, adding an extra layer, so excess heat and moisture needs to escape. The 3D construction effectively encourages that release.