Ski in Comfort with Zerofit – The Warmest Baselayer You’ll Ever Wear

As ski resorts across the globe gear up for a new season, skiers and snowboarders are turning to the Zerofit Heatrub Ultimate Baselayer for unbeatable warmth on the slopes. Already a go-to piece of gear in Japan, Europe, North America, and New Zealand, this baselayer is quickly becoming an essential for winter sports lovers everywhere.

What makes it special? The Heatrub Ultimate is designed to drastically cut down the number of layers you need, keeping you warm and comfortable even in freezing temperatures as low as -10°C. Independent testing at the Boken Quality Evaluation Institute—Japan’s top clothing and textile lab—proved that the Ultimate is an incredible five times warmer than a standard baselayer.

What Makes the Heatrub Ultimate So Special?

Most regular baselayers work by trapping your body heat through a super-tight, compressive fit. While that might keep you warm, it often feels restrictive and uncomfortable—especially if you’re wearing it all day on the slopes.

The Heatrub Ultimate takes a completely different approach. Instead of relying on compression, it’s made with innovative ‘Heat Threads’—soft fibers that generate warmth the moment you put it on. Whether it’s the baselayer, leggings or gloves, you’ll feel the heat instantly.

That’s why skiers and snowboarders love it: the comfort lasts all day, and the warmth is noticeable right away. It’s not just insulation—it’s active heat you can rely on when the temperatures drop.

The Heatrub Ultimate is in a league of its own when it comes to warmth. It has a heat retention rating of 0.78, compared to just 0.1–0.14 for a standard baselayer. Even a typical sweater only measures around 0.3.

In simple terms, that means the Ultimate is five times warmer than a regular baselayer—and nearly three times warmer than your average sweater. If staying warm in freezing conditions is your top priority, this is the gear that truly delivers.

It’s Official – Five Times Warmer Than a Standard Baselayer!

At Zerofit, we don’t just make bold claims—we back them up with science. That’s why we sent the Ultimate Baselayer to the experts at Boken Quality Evaluation Institute for independent testing. The results confirmed what our customers already know: the Ultimate really is five times warmer than a standard baselayer.

Does It Help Regulate Body Temperature?

The Ultimate Baselayer is unbeatable when it comes to pure warmth, but if your activity level ramps up and you’re likely to break a sweat on the slopes, the Move Baselayer is the smarter choice.

Independently tested at the Boken Institute, the Move has been proven to be twice as warm as a standard baselayer. Its inner layer is made with polypropylene for insulation, while the outer layer is designed to wick away moisture. That means as your body works harder, you stay dry, comfortable, and free from that dreaded “cold sweat” feeling.

The Move performs best in temperatures between -5°C and 12°C, making it ideal for skiing, snowboarding, or any activity where you’re constantly on the move. And for full coverage, the Move Leggings deliver the same advanced technology in a lower-body fit.

             This Ski Season, make sure you’re fully loaded with Zerofit Baselayers!