This new addition to Rapha's Baselayer system is designed for longer journeys at low temperatures. The Winter Base Layer is made from 100% New Zealand merino wool, with a yarn thickness of 18.9 microns making the material particularly soft and skin-friendly. The natural fibre is also scratch-free, highly moisture-removing and odour-repellent. Since it is made from a heavier yarn quality than the normal Rapha Base Layers, the turtleneck can be worn normally or pulled over the face to enhance the insulation effect like the Rapha Winter Collar. Since the Winter Base Layer is equipped with raglan sleeves, pocket straps do not rub and flat seams prevent friction.