Zerofit baselayers (shown here in the black style) won?t give you six-pack abs, but they?re warm and comfortable. (Photo by Kevin Wing)

Motorcyclists who enjoy spending all day in the saddle understand the value and flexibility of layering. Each layer of clothing traps insulating air molecules, so several thinner layers such as the Zerofit HeatRub baselayers typically keep you warmer than one bulky layer. And as temperatures change throughout the day, layers can be added or removed as needed.

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The Zerofit unique lineup of thermal baselayers called HeatRub come in two versions: Ultimate and Move. Inside the HeatRub Ultimate baselayers are extra-long fibers that gently rub against the skin to create frictional heat, which gets trapped in the tiny spaces around those fibers. The fibers are very soft, similar to cashmere or alpaca.
HeatRub Ultimate baselayers, which are available in a long-sleeved top and leggings, are made of a four-way stretch fabric blend of acrylic (69%), nylon (21%), wool (7%), polyester (2%), and polyurethane (2%). According to Zerofit, HeatRub Ulimate baselayers have a CLO rating ? a measure of a garment?s thermal insulation ? of 0.74. A thick sweater has a CLO of 0.35, so the Ultimate baselayers are said to be twice as warm as a sweater and five times warmer than a standard baselayer.

Zerofit HeatRub Ultimate baselayer in grey

Zerofit HeatRub Ultimate baselayer in olive green...