Good base layers simply fade into the background while keeping you warm and dry. But feel free to sing the praises of the women's Burton Midweight Base Layer Crewneck next time you hit the hill. Just add a mid layer and jacket as needed, and everything else will just fall into place. 102591. Plenty of Tech and StretchMidweight DRYRIDE Ultrawick polyester is highly breathable and ultra-fast wicking with plenty of stretch for an unrestricted feel. Stink LessBluesign® approved anti-odor finish keeps the stink awayLow Environmental ImpactBluesign® approved materials reduce impact on humans and the planet during manufacturing.