The castelli thermoflex 2 arm warmers are perfect if you dont need wet weather protection and are looking for an incredibly soft and insulating warmer that uses luxurious fabric to keep you protected in cooler climes. On the inside of the thermoflex 2 fabric, a super soft finish and the optimal loft have been achieved through castellis meticulous research and development. The fabric feels phenomenally comfortable against the skin and the loft traps just the right amount of air above the skin to keep your heat regulated over a wide range of autumn and winter conditions. The discreet black embossed castelli wordmark logos on these warmers is a nice touch and means that they can be worn with a wide range of jerseys. The dual sided silicone gripper on the upper edge keeps the warmers securely in place whilst the single seam construction and flatlock stitching contribute to a low profile look and feel. Key features thermoflex 2 fabric for exceptional warmth and softness minimal seam construction for aesthetic versatility and freedom of movement easily packable into a pocket highly breathable but also insulating optimal temperature range is 8c 20c