For when you start to feel frost building up on the outside of your jacket, your extremities are the first to start suffering. Castelli made the Estremo glove to cope with the very worst of the cold weather, making it warm, windproof but not so bulky that you can't feel your controls. On the palm side of the glove is a silicone print, which keeps your hands from slipping of the bars whilst you’re braking, shifting or just hit a rough patch. Gore’s Windstopper fabric is used on the back side of the glove to help cut the wind chill and shrug off showers too. The fleece layers and liner provide ample insulation and when you practically feel the warmth eminiating out theglove. Castelli recommend using the Estremo between -5 and 5 degrees Celsius but the glove could work either side of those numbers depending on your own personal thermostat.