The Porta Brace Polar Mitten for Canon XF300, 305 Cameras is a very thickly padded cover to keep your Canon XF300 or 305 cameras warm and dry. In cold climates, this system will also prevent condensation when it's brought inside from the cold. Tested to -50deg.F, it can be used hand-held or tripod mounted. Fleece-lined sleeves keep you comfortable during filming. The high-loft, heat-reflective insulation contains air-activated warmers that keep the camera warm. An insulated lens cap guards the front lens element. A center tripod access makes it even more usable and flexible.