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Helly Hansen Men's LIFA Active Crew Base Layer
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Helly Hansen Men's LIFA® Active Crew Base Layer
Comfortable from the first mile, and Helly Hansen actually tells you why.
Most "thermal" base layers give you an adjective and stop there. Helly Hansen builds the LIFA Active Crew as a 2-layer construction: 100% LIFA® polypropylene against your skin, a separate wicking layer outside it. The fibre doing the work is named, not implied.

The construction, named
Helly Hansen describes the LIFA Active Crew as "an advanced 2-layer construction with 100% LIFA® fiber next to skin and wicking technical fibers outside," and states it has "excellent moisture management properties." That is a fibre you can look up sitting directly against your skin, and a stated reason a second layer sits outside it, not an adjective standing in for both.
Built for the miles that matter
Helly Hansen names this garment's use as Trail Running, Resort Skiing and Ski Touring. That's the kind of day that swings from a cold start to a hard climb and back again, which is exactly when what sits against your skin matters most. It's also a bluesign® product, made with Oceanbound recycled materials, both from Helly Hansen's own page.
What Helly Hansen doesn't publish, and why it's still worth knowing
One published figure Helly Hansen doesn't give for this garment is a fabric weight, GSM, grams per square metre. There is no temperature rating either, and no lab test comparing it to cotton or merino. What is published and checkable is the fibre next to your skin and the construction around it, above, which is the same check worth running on any base layer, thermal or not.

Built so the sweat from the climb doesn't sit against your skin on the way down.
Check the size and colour on the page before you check out; it opens on one of each.
| Sizes | S | M | L | XL | XXL |
|---|
Helly Hansen's own page says: "Customers say product fits true to size. We recommend sticking with your regular size." For exact body measurements against each size, Helly Hansen's own size guide carries the full chart; check that before you buy rather than guessing from the S to XXL range alone. This listing is the men's version; Helly Hansen also sells a women's LIFA Active Crew (No. 49393, XS to XL), but it is a separate listing with its own sizing, not reachable from this link.
| Product | Helly Hansen Men's LIFA® Active Crew Base Layer |
| Amazon UK ASIN | B0CKXG19WH |
| Brand | Helly Hansen |
| Model | 49389 |
| Department | Men's (Helly Hansen also sells a separate Women's LIFA Active Crew, No. 49393, XS to XL; not this product, not this page) |
| Construction | 2-layer: 100% LIFA® polypropylene next to skin, wicking technical fibres outside (Helly Hansen) |
| Fibre split | 66% polyester, 34% polypropylene (Helly Hansen) |
| Moisture management | "Excellent moisture management properties" (Helly Hansen) |
| Certification | bluesign® product (Helly Hansen) |
| Materials | Oceanbound recycled materials (Helly Hansen) |
| Neckline | Crew |
| Intended use | Trail Running, Resort Skiing, Ski Touring (Helly Hansen) |
| Sizing | S to XXL |
- Is this built for running, or is it ski gear?
- Helly Hansen lists Trail Running alongside Resort Skiing and Ski Touring as intended uses for this garment, on the brand's own product page.
- What's actually next to my skin?
- 100% LIFA® polypropylene, Helly Hansen's own fibre, built directly against the skin, with a separate wicking layer outside it. Helly Hansen calls the combined result "excellent moisture management properties."
- Does Helly Hansen publish a fabric weight or temperature rating?
- No. There is no GSM figure and no temperature rating for this garment, from Helly Hansen or from Amazon. What is published is the construction and fibre detail above.
- What size should I get?
- It is sold S to XXL. Helly Hansen's own page says: "Customers say product fits true to size. We recommend sticking with your regular size." For exact measurements, check Helly Hansen's own size guide rather than guess from the range.
- Is there a women's version?
- This listing is the men's version. Helly Hansen also sells a women's LIFA Active Crew (No. 49393, XS to XL), but it is a separate listing with its own sizing, not reachable from this link.
- Where do I buy it?
- The Buy on Amazon button takes you to the product page on Amazon, where you complete your purchase. It opens on one size; use the guide above to pick yours before you check out.

Comfortable from the first mile, named construction included.
Pick your size on the page before you check out; the link opens on one.
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