Shot over two successive winters, this project documents the women who swim in Hampstead Heath Ladies Pond year-round, in water temperatures reaching as low as -1. In the darkest months the pond freezes over almost completely, and the space to swim in shrinks to a fraction; the women, undeterred, swim up to the ice's edge to hear it creak and sing. These photographs bear witness to their exhilaration, their boldness, and the beauty and purity of the pond itself.