The PhD® Seamless Strappy Bra by Smartwool was designed for women in search of medium impact support and soft merino comfort for activities like climbing, hiking and running. The interior of this bra is seamless and lined with a finely woven merino wool blend that stretches and breathes while wicking away moisture and resisting stinky odors. Adjustable, softly lined crossover shoulder straps offer customizable stability.