Made from a fabric developed exclusively by Rapha, these high-performance arm warmers combine the natural performance properties of merino wool with a degree of Lycra for stretch and durability. They provide insulation, are highly breathable and also transfer moisture effectively. The fabric is quick-drying so the arm warmers can be used in a variety of conditions. They are versatile enough for city riding and work brilliantly when paired with any short-sleeved Rapha jersey.