The Celsius R road boot is made with the Pique Gore-Tex® membrane which keeps the feet warm and perfectly insulated during mild winters. Comfort and insulation are further aided by the additional lining on the tip of the foot.Key Features:NRG Air carbon reinforced sole (8 stiffness index).,Pique Gore-Tex® membrane.,Reinforced toe with anti-abrasion technology.,SLW2 closure system.,Easyfit Climaflex collar with Gore-Tex Rattler® membrane.,Arctic 4layer insole.,360° visibility..