Which size should I choose?

Choose your usual size for a very close fit. For more room, or if you are between sizes, size up. Sizes are combined: S/M, L/XL, 2XL/3XL.

Yes. It extends low over the hips to cover the lower back well, and its sleeves are fairly long.

What is it made from?

53% polyamide, 40% polypropylene and 7% elastane: a synthetic blend with no wool or silk.

Is it enough in extreme cold?

When active, it's suitable down to around -5 °C under a jacket. When you stop, it may feel too light at 5 °C: add a fleece.

What should I wear over it?

Wear it against your skin as a base layer. In cold weather, add a fleece over it. For rain, finish with a waterproof jacket.

Does it retain odours?

Its POLYGIENE® treatment limits the growth of odour-causing bacteria, so it can be worn on several outings before washing. How many days depends on exertion and temperature.

How should I wash it?

Wash at 30 °C maximum, without fabric softener. Air dry and avoid tumble drying.

What are the delivery times for this product?

All orders placed by midnight are prepared the next day. In France, orders placed before 1 pm (excluding weekends) with Chronopost 24h are dispatched the same day. Delivery then depends on the carrier and takes 1 to 4 days in France. Delivery times for Europe and the rest of the world vary by destination.

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.

Men’s seamless thermal t-shirt - Seamless Top

59,90 €

76 reviews

Insulating

Breathable

Antibacterial

160 g (size S/M)

Black

Delivered from Thu 12 Nov.

Free returns within 30 days

Free repairs for life

By La Réparerie, our repair service.

Complete your outfit

Bauges

Men's ultra-lightweight, breathable technical t-shirt

39,90 €

MERINO SOCKS

Warm merino wool socks

19,90 €

SEAMLESS TOP

59,90 €

76 reviews

Delivered from Thu 12 Nov.

Free returns within 30 days

Who did we design it for?

For high-intensity winter activities: ski touring, trail, mountaineering. For anyone who wants a close-fitting base layer that reduces chafing.

How warm are they?

Rated warm for active use in winter. It retains heat while you move; add a layer over it when you stop or in extreme cold.

How breathable is it?

The open-knit panels visible on the back let sweat escape during exercise, and the fabric dries very quickly.

What makes it different?

Our CIMATHERM® Stretch technology combines warmth and freedom of movement in a seamless knit. The POLYGIENE® treatment limits odours between outings.

Its performance

Drying time

Very fast

Durability

Durable fabric

Stretch

Highly stretchy fabric

Warmth

Warm

Ideal for

Alpine skiing

Cross-country skiing

Ski hiking

Snowshoes

Trail running

Mountaineering

The thermal top that stays in place

In the winter mountains, every detail counts. A fold, a misplaced seam or fabric that pulls at the wrong moment can break your concentration. This thermal top answers with a seamless knit: the fabric slides smoothly, fits closely and moves with you.

The stretch fit follows your shape and sits very close to the body. Climb, descend, turn: the top stays in place and sits discreetly under your layers.

It retains warmth on climbs and dries quickly as your body heats up.

An unobtrusive companion for long winter outings.

Key features

Seamless knit

Seamless knit designed to reduce chafing.

Low high collar

A low high collar that sits close to the neck and fits under a neck gaiter or helmet.

Ergonomic fit

A close fit that follows the shape of your body and reduces cold air getting in.

CIMATHERM® Stretch Technology

POLYGIENE® StayFresh technology

Warmth and freedom of movement for active pursuits in cool conditions.

Effective thermal insulation : retains body heat during effort.
Multi-directional stretch: stretchy fabric that moves with you without restriction.
Comfort in motion : suited to dynamic activities requiring freedom of movement and thermal regulation.

CIMATHERM® STRETCH technology prioritises resistant materials to ensure durability and lasting performance over time.

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.

Details

Specifications

Weight

160g (S/M)

Brand

Cimalp

Fabrics

53% Polyamide, 40% polypropylene, 7% elastane

Insulation

Warm

Size type

Men's Top

Traceability

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

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Reviews

4.7

Based on 76 reviews

5

84%

4

6%

3

6%

2

0%

1

2%

Customers recommend the usual size

Comfort

Warmth

Breathability

In summary This content is written by AI

Customers especially appreciate this warm, comfortable base layer, which fits very close to the body: many describe it as a second skin that you soon forget you are wearing. They also praise its breathability: when running in sub-zero temperatures, trail running without feeling cold, or cycling and hiking, it retains warmth without causing overheating, although one sustained 40 km effort left it damp. To choose the right fit, consider going up a size, as it runs small and the sleeves are often considered too long. It is particularly suited to winter activities.

Emilie.S

Verified customer

Ordered size S/M Ordered color Noir

Translated review

22/01/2026

I ordered the smallest size because it was for a woman (the colors were nicer than the women's sizes). It's a very comfortable second skin, effective for running with just a light windbreaker in sub-zero temperatures. You don't feel like you're sweating and it keeps you warm without being overheated: truly a great product. It's very form-fitting, long on the hips, but very flexible. The material on the shoulders is very comfortable and supple.

Stéphane.L

Verified customer

Ordered size L/XL Ordered color Bleu

Translated review

19/11/2025

Tested this morning in cold and rainy weather, worn under my Cimalp Storm Pro jacket. The thermal base layer is a very snug fit but comfortable. The insulating quality is remarkable; as someone prone to excessive sweating during exercise, I didn't experience any of the cold or dampness that you can feel with a cotton t-shirt. It's a very good product.

Sébastien.B

Verified customer

Ordered size S/M Ordered color Noir

Translated review

17/01/2026

Absolutely fantastic! Fits perfectly! Great product, tested on a trail run, no feeling of cold at all. Very stylish look. Excellent length. Provides excellent back protection. Highly recommended product.

Jean-Philippe.B

Verified customer

Ordered size S/M Ordered color Bleu

Translated review

27/10/2025

The sizing is a little tight, however, once on your back after a bit of contortion to get it on and position it correctly, it feels perfect. This technical garment is effective against the cold when you're active outdoors in sub-zero temperatures.

Grégory.S

Verified customer

Ordered size S/M Ordered color Noir

Translated review

26/01/2026

It fits very close to the body, is comfortable, warm, and breathable. I've adopted it for winter!