Can I wear a cotton t-shirt underneath?

This is strongly inadvisable. Cotton retains moisture and dries very slowly, leaving you feeling cold during rest stops. Wear this technical garment directly against your skin.

What should I wear over this garment?

This model is designed to act as a second skin. Its role is to wick away moisture and keep you dry. If it's cold, add a fleece on top (second layer). To protect yourself from the elements, wear a waterproof jacket as your third layer.

How should I wash this garment to preserve its breathability?

Wash at a maximum of 30°C. The golden rule for sportswear is to avoid fabric softener: it clogs the micro-pores of the fabric and blocks moisture wicking. Air drying is very quick — avoid the tumble dryer.

What are the delivery times for this product?

If you place your order before 1 pm (excluding weekends), it will be dispatched the same day. Allow 2 to 4 working days for home delivery or collection point delivery within mainland France.

Can I return the item if the size doesn't fit?

Yes, absolutely. You have 30 days to return it and get a refund or an exchange. Return shipping is free. The item must be new, unworn, unwashed, and have its original tag.

Women's extra-warm thermal base layer with round neck

59,90 €

33 reviews

Black

Delivered from Fri 23 Oct.

Free returns within 30 days

Available in several versions

Men Women

Crew neck Half-zip

Free repairs for life

By La Réparerie, our repair service.

Complete your outfit

MERINO SOCKS

Warm merino wool socks

19,90 €

AIGLIERE

Women's short-sleeved merino wool T-shirt

59,90 €

X-WARM TOP

59,90 €

33 reviews

Delivered from Fri 23 Oct.

Free returns within 30 days

Who did we design it for?

For mountaineers and winter hikers who push their outings in very low temperatures, from glaciers to high-altitude summits.

They alternate between intense effort and exposed rest stops in the cold, where every break drops thermal comfort within minutes.

This profile demands a base layer capable of managing both heat build-up and static phases exposed to extreme cold.

How should you wear it?

To be worn as a base layer directly against the skin: direct contact optimises moisture transfer. Layer a fleece for warmth, and a hardshell jacket in wind or rain. Second-skin fitted cut — order your usual size.

What makes the difference?

Its construction with 2 insulating fabrics delivers intense warmth even in extreme cold, without blocking moisture evacuation. An active thermal balance that maintains dry comfort from the ascent to the rest stop.

Its performance

Drying time

Very fast

Durability

Highly durable fabric

Stretch

Stretch fabric

Warmth

Very warm

Ideal for

Alpine skiing

Cross-country skiing

Ski hiking

Hiking

Snowshoes

Warmth that never lets go

High in the mountains, the bitter cold sets in the moment you stop. Moisture built up during effort turns to an icy sensation at the summit: if the base layer fails, your entire thermal comfort collapses.

This base layer was designed for the coldest conditions. Its construction combining two levels of insulation traps body heat while actively wicking away moisture generated during effort. It moves with you without chafing, and neutralises odours over time.

Because maximum insulation starts next to the skin. It's the foundation everything else is built on.

Key features

Stretch fabric

No movement restrictions thanks to its stretch fabric

Dual-fabric construction

- Double thermal barrier to tackle extreme cold conditions.

POLYGIENE® StayFresh technology

CIMATHERM® Technology

Contrôle durable des odeurs pour un confort prolongé pendant l’activité.

Technologie anti-odeurs : limite le développement des bactéries responsables des mauvaises odeurs.
Entretien réduit : permet d’espacer les lavages et de prolonger l’usage du vêtement.
Confort préservé : traitement intégré qui n’altère ni la respirabilité ni le toucher du textile.

Développée par Polygiene®, spécialiste des technologies de contrôle des odeurs, la technologie POLYGIENE® STAYFRESH™ assure durabilité et efficacité dans le temps.

Targeted warmth suited to activities in cool conditions.

Effective insulation : retains body heat during outings in cool weather.
durable Thermal Comfort : maintains a good thermal balance, both in motion and during rest phases.
Soft-touch fabric : comfortable to wear, even during extended use.

CIMATHERM technology favours resistant materials to ensure durability and long-lasting thermal performance over time.

Details

Specifications

Weight

200g (S)

Brand

Cimalp

Insulation

Very warm

Size type

Women's Top

Traceability

Product sheet on environmental qualities and characteristics
Manufacturing: China
Weaving/Knitting: China
Dyeing/Printing: China
Releases plastic microfibres into the environment when washed

Reviews

5.0

Based on 33 reviews

5

100%

4

0%

3

0%

2

0%

1

0%

Customers recommend the usual size

Comfort

Warmth

Breathability

In summary This content is written by AI

Customers are won over by its warmth and comfort: many find it soft, pleasant to wear and effective as a base layer without being too hot. Several also appreciate how lightweight it is and have worn it skiing, snowshoeing, trail running, in a mountain refuge or in Norway; one customer stayed warm at 0°C with a hoodie and a light jacket. Be aware that the fit is often considered quite tight or small: choose one size up if you are between sizes.

Pascale.R

Verified customer

Ordered size S Ordered color Bleu

Translated review

06/02/2025

Il est très chaud et confortable. La couleur est conforme à la photo. Je mesure 164 cm et pèse 57 kg. La taille S est un peu juste au niveau des épaules. J'ai déjà pris une taille M et je pense me situer entre les deux tailles.

Christine.M

Verified customer

Ordered size S Ordered color Bleu

Translated review

10/01/2025

Perfect for winter outings with snowshoes or skiing, very comfortable and warm, good fit.

Ignace.A

Verified customer

Ordered size S Ordered color Noir

Translated review

25/12/2024

Parcel received on time, it's perfect, it's neat, it's fast, top quality clothing, I recommend it, went out in 0 degrees with a hoodue and a light jacket, I stayed warm, effective clothing, thank you Cimalp.

Brigitte.H

Verified customer

Ordered size L Ordered color Noir

Translated review

29/01/2025

Excellent base layer, warm but not too hot.

Veronique.L

Verified customer

Ordered size S Ordered color Noir

Translated review

21/01/2025

The article tested in Norway keeps warm and has a beautiful feminine cut.