Check the listing for details. Zerofit Heatrub Ultimate Unisex Pants Thermal Motorcycle Base Layer Bottoms. Color: Black, Condition: New with tags. Suitable for Off-Road, ATV, Motocross/Enduro, Kart Racing, Motorcycle, On-Road, Car Racing, Snowmobile. Listed at 146.09 USD. The Heatrub Ultimate Leggings are made from the same material as the award-winning Heatrub Ultimate baselayer, which is five times warmer than a standard baselayer. The leggings are comparable to fleece lined overtrousers, but with the added benefit of ease of movement for active SPORTS and working, even in the coldest of conditions. The Heatrub technology, engineered in Zerofit’s Japanese homeland, uses ‘double-loop’ barrel fabric which provides both heat insulation and ‘friction heating’. The extra-long heat threads ensure a layer of warm air is retained around your legs and even just a little movement of these bristles causes friction which creates cosy warmth. The Heatrub Ultimate Leggings are made from the same material as the Ultimate baselayer, and offer super stretch in four differ.