Lightweight merino rib-knit baselayer tank. Every adventurous woman knows it's necessary to keep a few ''core-warmers'' in her gear quiver, and the Woolies Racerback definitely fits the bill. Made of soft Merino wool that won't chafe or bunch, throw this under your first layer to keep your temperature stable. Flatlock seams. Tag-free label. Back length from top of shoulder=25 1/2''. Material: Wool.