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  • trail socks and arm warmers unisex ULTRA
  • trail socks and arm warmers unisex ULTRA
  • trail socks and arm warmers unisex ULTRA
  • trail socks and arm warmers unisex ULTRA
  • trail socks and arm warmers unisex ULTRA

ULTRA

Anti-blister ultra-trail socks with reinforcements

19,90 €

26 reviews

Breathable

Recycled material

Ultra-resistant

42 g (size 42-44)

Sky

Pack offer

Delivered from Tue 17 Nov.

Free returns within 30 days

Free repairs for life

By La Réparerie, our repair service.

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Who did we design them for?

For ultra-trail runners who want a thin sock with reinforcements where friction is greatest, for long runs and technical descents.

How breathable is it?

Thin knit fabric and breathable zones ventilate the foot and ankle, helping prevent heat build-up on long runs.

What height?

High-cut: the sock extends above the ankle, for trail shoes with a collar that reaches the ankle.

What material is it made from?

88% polyamide, 6% elastane and 6% TPU: a thin synthetic knit, with no wool.

Its performance

Breathability

Drying time

Very fast

Durability

Durable fabric

Warmth

Ideal for

Trail running

Ultra-trail

When friction turns into blisters

A thick sock might feel reassuring. But it wrinkles more. On the downhill, it is that fold which slips and rubs — not the thickness that protects. Over ultra distances, this detail takes a heavy toll late in the race.

These socks take the opposite approach: a thin knit for a precise feel underfoot, with reinforcements only at the ankle bones and Achilles tendon - where friction is greatest. Silicone bands hold the foot in place inside the shoe, reducing slipping and bunching without unnecessary compression elsewhere.

Because the best ultra-running sock is one you forget you’re wearing.

Key features

Anti-slip, anti-blister

Silicone grip strips: keeps your foot locked in the shoe, with no bunching or friction.

Support and protection

Strategic compression for targeted support. Reinforcements at the malleolus and Achilles tendon, right where friction turns into blisters.

Continuous Airflow

- Thin fabric and strategically placed breathable zones for better airflow,
- Active ventilation around the foot and ankle to help prevent heat build-up.

Details

Specifications

Weight

42g (42-44)

Brand

Cimalp

Fabrics

88% Polyamide, 6% elastane, 6% TPU

Traceability

Manufacturing: Italy
Weaving/Knitting: Italy
Dyeing/Printing: Italy
MATERIAL CHARACTERISTICS: Releases plastic microfibres into the environment when washed

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Reviews

4.8
Based on 26 reviews
5
80%
4
15%
3
3%
2
0%
1
0%
Customers recommend the usual size
Comfort
Durability

In summary This content is written by AI

Customers first appreciate their comfort: most find them pleasant to put on and wear, with no discomfort or overheating. Several praise their secure fit and the lack of rubbing, while the reinforced heel and toe areas inspire confidence for training runs and ultra-distance outings. The feel against the skin is also appreciated. A word of advice: durability still needs to be confirmed, as several customers have only used them once or on a few outings.

valentin M.
Verified customer
Height 172cm Usually wears S Usage Trail running
Translated review
06/11/2026

Bought them by chance the week they came out. I haven't gone without them since!

marc V.
Verified customer
Height 174cm Usually wears M Ordered size 42/44 Ordered color Ciel Usage Trail running
Translated review
11/11/2026

The sock stays discreet despite its excellent fit inside the shoe and around the calf. A really good sock that deserves to come in every color.

Cyril M.
Verified customer
Height 169cm Usually wears M Ordered size 42/44 Ordered color Blanc Usage Trail running
Translated review
06/11/2026

Very comfortable socks. A real pleasure to put on. Time will tell if this feeling lasts, but you can definitely feel the high quality of the product. In use, no chafing at all.

Antoine G.
Verified customer
Height 170cm Usually wears XS Ordered size 42/44 Ordered color Marine Usage Randonnée
Translated review
30/10/2026

Great, a pleasant surprise! Comfortable and nice on the skin.

alexis D.
Verified customer
Height 188cm Usually wears M Ordered size 42/44 Ordered color Blanc Usage Trail running
Translated review
07/11/2026

Comfortable and stylish! No discomfort whatsoever on the foot.

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F.A.Q

We answer your questions

Need help?

Our team of experts, based in Valence in the Drôme, will get back to you quickly by email, from product advice to order tracking.Based in the French Alps, our specialist team provides prompt email support for product guidance, order tracking, and any other inquiries.

Frequently asked questions Contact us

FAQ

Frequently asked questions

These socks are unisex. Choose your usual shoe size: each size covers three shoe sizes (36/38, 39/41, 42/44 and 45/47).

These are high-cut socks: they extend above the ankle.

They reduce friction where it is most likely to occur: reinforcements around the ankle bones and Achilles tendon, plus silicone strips that hold the foot in place inside the shoe. A well-fitting shoe is just as important.

They are deliberately thin: the fine knit helps you maintain a precise feel for the terrain, while reinforcements are limited to the ankle bones and Achilles tendon. The idea is to avoid creases that cause friction on descents, rather than rely on thickness for protection.

Yes. Their fine knit and breathable zones ventilate the foot and ankle to help prevent heat build-up.

No, they are synthetic socks: 88% polyamide, 6% elastane and 6% TPU, with no wool. They dry very quickly.

Wash them at 30 °C maximum without fabric softener and leave them to air-dry; do not tumble-dry. They are made from polyamide, elastane and TPU, synthetic materials that release plastic microfibres into the environment during washing.

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.

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.

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