ZEROFIT HEATRUB ULTIMATE £60

The Ultimate is Zerofit’s warmest base layer – and it might be the warmest base layer we’ve ever tried, comfortably handling temperatures down to -10°C. The ‘double-loop’ fibres provide insulation and ‘friction heating’; the extra-long bristles trap a layer of warm air around the body, while even a little movement of these bristles causes heatgenerating friction to warm you up. VERDICT If you feel the cold and struggle to stay warm on the chilliest winter days, the Heatrub Ultimate is the base layer for you.