Airbase Base Layer - Top
Airbase Base Layer - Top
Airbase Base Layer - Top

Airbase Base Layer - Top

Best next-to-skin layer in the world

Regular price $79.00
Layer: Base Layer

🚚 FREE Domestic Shipping On $299+ Orders

Made in Finland by people who know how to stay warm when it’s cold, this is the best next-to-skin layer in the world. Polypropylene is widely known as the best wicking fabric, but even with traditional polypropylene you can feel periods of damp chill when your body builds a layer of sweat or you simply get wet. But with the Airbases big air pockets, you have nothing contacting the majority of your skin surface, while adjacent polypropylene wicks moisture, so you always feel dry. You can wear pretty much anything over the top of it and feel comfortable and dry, in any weather. And if you’re out on a day that gets hotter, you simply expose the base layer and, voila, you get instant full-blown cooling. So you can literally wear this stuff right into a warm day, and regulate your temperature more easily than with any other garment. Made of polypropylene with silver ion scent control. Shirt has knit collar and cuffs.


  • Color: Gray

Airbase Base Layer Demonstration

  • Polypropylene fabric
  • Big air pockets
  • Comfortable
  • Regulate temperature
  • Knit collar & cuffs


With Airbase’s big air pockets, you have nothing contacting the majority of your skin surface, while adjacent polypropylene wicks moisture, so you always feel dry and warm.


Designed for a close-to-the-body feel with a four way stretch material that won’t hold you back.


With a water resistant, yet-extremely breathable membrane and 4-way stretch, mid weight layers provide excellent warmth-to-weight ratio to keep you comfortable without weighing you down.


Technical, versatile, lightweight, and built to last. Made of 4-way stretch polyester with a DWR finish, providing a close riding, athletic fit with a cut that gives unrestrained freedom of movement.


Featuring 80gm Primaloft insulation, packable into its inside-chest pocket, breathable, and touting a superior warmth-to-weight ratio, Eberlestock cold weather gear is built to perform.


Four-way stretch fabric with a 40K+ breathability rating and 20K+ waterproofing will keep you dry when it rains -- and will not cause it to rain condensation inside the jacket when you are climbing up a mountain.

Eberlestock Sizing Chart

Customer Reviews

Based on 26 reviews
No doubt this will be awesome, tested with light use

Went sledding for an hour with the bottoms and top, under jeans and a northface apex jacket with Tshirt. Sledded for an hour in 20 degrees fahrenheit, jeans were completely soaked.

I never felt cold, or chilled even when the lower was soaked with my jeans. Body heat from walking climbing back up kept me warm.

~Yes i duplicated my other review as it was precise in my opinion of the product.

Initial Impressions

I haven’t had a chance to try these in the field yet but I’ll give you an initial impression re: fit and perceived quality. Firstly, they are very light (yes, I know pretty much all thermal underwear are light but these even more so) which when combined with the stitching interface (the mesh is quite open) means it will be interesting to see how durable they are. None-the-less they do seem to be put together well and I certainly don’t have any reservations about holding onto them to try out. As for fit, sizing appears to be accurate. Now, they may be a little tight but that may be as I’m right between a medium and large fit (and chose the medium) but certainty not uncomfortably so and hopefully a day-or-two’s wear will help ‘shape’ them (i.e: tug at the mesh in certain directions). FWIW I also ordered the long Johns in medium and they seem fine also and given it is usually the opposite fit problem as I have what you’d call a cyclists physique, I feel confident in calling the size chart accurate. The only thing I’d like to see changed is the possible addition of a few more inches of length to the torso. I say this because the hem isn’t trimmed like the neck (which is a good thing as it means one less thing digging-in or rubbing under a pack harness/hip belt) and may ride up. This last point is a ‘possible’ though as the waist of the long Johns is quite high (again, a good thing as I’d rather it sit higher than the waist of my over pants or hip belt) and may well mitigate the need for the extra torso length but may mean they need to be worn as a set. Wait and see I guess! In summation I feel they appear to meet Erblestock’s claims on first inspection and given my wholly positive experience. With a number of their other products I feel confident that these will perform as required. If there is option to update my review in the future I’ll try to do so, though you will have to wait - it is the middle of summer down here in Australia at the moment!

Great Base Layer/System!!

I purchased the Airbase Base Layer top/bottom, put them to the test at multiple elevations, temps, and backcountry activities like hiking, climbing, and snowshoeing. I was taken back at how well they wick moisture away, keep you warm, and how fast they can cool you down when needed. Worked so well, I bought the whole family a set before hitting the slopes/mountains.

Two worlds!

Wicks water when swearing and harbors heat when it's cold. The best of both worlds


Airbase Base Layer - Top