686 Plaid Base Layer Bottom - Women's: The Plaid Base Layer material is 92% polyester 8% lycra and has a bonded brushed micro fleece on the inside. This is the heavier weight of the two base layers offered from 686. This fabric is easy to layer with its slick exterior yet is really cozy and warm due to that fine layer of fleece on the inside. The Plaid Base Layer Bottom is a Capri fit instead of a full-length leg fit as in the Rings Base Layer Bottom. The Capri fit is nice so you don’t have the extra base layer material shoved in, or bunched up around your snowboard boot.