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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 targeted reinforcements

19,90 €

2 reviews

Sky

Pack offer

Delivered between 1 - 6 Oct.

Free returns within 30 days

Our guarantee: we repair your gear for life

A repaired garment is a story extended. We ensure the longevity of your Cimalp equipment, season after season.

Who did we design them for?

For ultra-trail runners who don't want to worry about blisters after the first aid station.

Designed for long runs and endurance races, where friction, the technical descents and fatigue put your feet to the test.

For runners looking for a thin, providing targeted protection of the malleoli and the Achilles tendon, while maintaining precise ground feel.

How to wear them?

If you are between two sizes, choose the smaller size to avoid folds that cause blisters.

What sets them apart?

Its silicone grip strips lock the foot in place inside the shoe—zero slip, zero bunching—where a thicker sock would allow the foot to slide. Its reinforcements at the malleolus and Achilles tendon specifically target high-friction areas without adding bulk elsewhere. Fine knit, precise support—built for long distances.

Its performance

Breathability

Durability

Quick-drying

Warmth

Ideal for

Trail running

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.

ULTRA takes the opposite approach: a fine knit for precise ground feel, and reinforcements placed exclusively at the ankles and Achilles tendon — right where friction builds up. The silicone grip strips lock your foot inside the shoe: zero slippage, zero bunching, without unnecessary compression elsewhere.

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 profile and strategic breathable zones for enhanced airflow,
    - Active ventilation around the foot and ankle, zero heat build-up.

Breathable Recycled material Ultra-resistant Breathable Recycled material Ultra-resistant Breathable Recycled material Ultra-resistant Breathable Recycled material Ultra-resistant

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

Reviews

4.5
Based on 2 reviews
5
50%
4
50%
3
0%
2
0%
1
0%
Customers recommend the usual size
Comfort
Durability
Massimo H.
Verified customer
Ordered size 39/41 Ordered color Ciel Usage Trail running
Translated review
21/09/2026

Perfect socks, excellent purchase.

Florian V.
Verified customer
Usually wears L Ordered size 42/44 Ordered color Marine Usage Trail running
Translated review
20/09/2026

A bit thin; for an ultra, I find them a bit light.

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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.

Frequently asked questions Contact us

FAQ

Frequently asked questions

Protection comes from the construction, not the thickness. The ergonomic left/right knitting follows the anatomy of the foot and eliminates bunching at the base of the toes — the primary cause of blisters. Exposed areas in trail running are reinforced in a targeted manner depending on the model: heel, toe cap, ankles and Achilles tendon.

Yes. The elastic construction holds the sock snugly against the foot without compressing it, for consistent support from the first to the last kilometre. Combined with left/right-specific knitting, it prevents slipping inside the shoe and the formation of folds. The sock moves with the foot rather than over it.

Yes — that's what they're built for. Breathable synthetic fibres actively wick moisture away and create ventilation around the foot and ankle, with no heat build-up. The whole thing stays ultra-lightweight so you forget it's there from the very first kilometre.

A blister almost always comes from the same mechanism: a fold forms in the sock, followed by repeated friction at that point. Ergonomic right-foot / left-foot knitting eliminates folds from the construction stage, especially at the base of the toes. The elastic construction then prevents any slipping inside the shoe: the sock follows the foot instead of moving over it. The most exposed areas — heel, toe, ankle bones and Achilles tendon — also receive targeted reinforcement depending on the model.

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.

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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