These do exactly what the name suggests: keep you warm. With superior thermal qualities & a durable chamois, the support for longer days in the saddle is real. More below. The perfect cold weather bibs. These are the ones you want! Teflon HT treated Thermolite provides insulation & comfort Wicking stretch mesh upper bib to prevent overheating with zip fly Ergonomic body paneling; High stretch Lycra bound straps Reflective logos on thigh & rear; All seams fully flatlocked for comfort