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 Wide 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 combined with a supportive outer layer; Knit-in Smartwool logo at center back