Heartbreak Women's Boston Born Singlet 2' Whistle at collar is easy

Whistle at collar is easy to access

Strategically placed silicone helps keep the belt in place and prevent slipping

The wide design combines with underfoot flexibility to feel comfortable as you take off

The name "Bear Cage" is a nod to the famed hill loop of Boston's legendary cross-country course

Heartbreak Women's Boston Born Singlet 2' Whistle at collar is easyThe Boston Born apparel & accessory collection takes the shifting colors of metal under extreme heat found in our Oakley CNCPTS Heartbreak eyewear collaboration into garments built to move fast. The rib cage hits on the singlet call out the elevation and mileage in relation to the iconic race's starting line. The coordinates at the hem reference the collaborators global locations. The name Boston Born speaks to the pride of place where CNCPTS and