Features of the Smartwool Women's PhD Seamless Racerback Bra 4 Degree elite Fit system for unparalleled support Covered elastic band at ribcage provides a secure anchor point Straps provide stability and support Engineered knit cups Ribbed knit side panels for increased support, and a smooth look and feel Seamless knit Merino Wool interior for ultimate next-to-skin comfort Knit-in SmartWool logo at center back