• Men’s ultralight over-the-calf ski socks by Laetts, navy and gray striped Merino wool blend with patented HygroHeat™ thermal technology for lightweight warmth and precise ski boot fit.
  • Laetts Men’s Ultralight Ski Socks, over-the-calf height (OTC), navy and gray stripe pattern, featuring Merino wool and patented HygroHeat™ thermal technology for lightweight warmth and a precise ski boot fit.
  • Detailed close-up of Laetts Men’s Ultralight Ski Sock showing Merino wool knit structure and patented HygroHeat™ thermal yarn integration at the reinforced heel panel for lightweight ski performance.
  • Laetts Women’s Ultralight Ski Socks in blue and pink with multicolor performance stripes, shown standing upright to display full-length OTC design, featuring Merino wool blend and patented HygroHeat™ warmth technology, 3D image.
  • Laetts Women’s Ultralight Ski Socks in blue with pink and red performance stripes, shown in a flat lay with crossed foot area to highlight knit details, featuring Merino wool blend and patented HygroHeat™ warmth technology.
  • Close-up of Laetts Women’s Ultralight Ski Sock showing fine Merino wool knit texture in blue and pink performance stripes, featuring patented HygroHeat™ warmth technology.zones.

Ultralight Ski — No Cushion

Ultralight Ski — No Cushion

Merino Thermal Socks — Warmth Without Bulk

$37.95
$37.95
SAVE Sold out

Patented HygroHeat™

Extra Fine Merino Wool

30 Day Return

Free-shipping on Orders $89.00+

Our best-selling Ultralight Ski Sock is engineered for skiers who demand speed, precision, and pure boot feel. Powered by the Laetts Merino Thermal System™, this no-cushion profile delivers instant edge response while HygroHeat™ actively radiates warmth without adding bulk. The ultra-slim fit minimizes stack height for pure precision through gates and on hardpack.

Learn more: Merino Thermal System

Attributes

Shaft Height:    Over-the-Calf

Weight:            Ultralight

Cushion：        No-cushion

Form：             Anatomic

Style：             Sporty

Item Number：SKI-UL-25

Fibre Content

34% Wool, 29% Nylon, 19% Viscose, 13% Acrylic, 5% Spandex

Care

Machine wash in warm water on gentle cycle, inside out. Do not bleach. Tumble dry low or hang dry. Do not dry clean. Do not iron.

Men’s ultralight over-the-calf ski socks by Laetts, navy and gray striped Merino wool blend with patented HygroHeat™ thermal technology for lightweight warmth and precise ski boot fit.

Ultralight Ski — No Cushion

$37.95
$37.95
SAVE Sold out
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MERINO THERMAL SYSTEM™

HYGROGHEAT™

BOOTGLIDE™

Warm & Light

Temperature-Regulating

Moisture-Wicking

Odor-Free Comfort

MERINO THERMAL SYSTEM™

HYGROGHEAT™

BOOTGLIDE™

Warm & Light

Temperature-Regulating

Moisture-Wicking

Odor-Free Comfort

MERINO THERMAL SYSTEM™

HYGROGHEAT™

BOOTGLIDE™

Warm & Light

Temperature-Regulating

Moisture-Wicking

Odor-Free Comfort

MERINO THERMAL SYSTEM™

HYGROGHEAT™

BOOTGLIDE™

Warm & Light

Temperature-Regulating

Moisture-Wicking

Odor-Free Comfort

Functions

  • HygroHeat™ Thermal Core

    Patented ceramic system reflects body heat using far-infrared (FIR) technology for self-sustaining warmth — without batteries or bulk.

  • Up to 8.8°C Warmer

    Lab-tested to retain significantly more warmth than standard Merino socks — for longer comfort in the cold.

  • Ultralight Thermal Build

    Designed to deliver high warmth-to-weight ratio — stays light in performance boots without sacrificing heat.

  • Natural Odor Control

    Merino’s natural antimicrobial properties help reduce odor — for fresher feet on long days.

  • Moisture-Regulating Yarn

    Engineered fibers manage sweat and moisture to help keep your feet dry, even under pressure.

  • Eco-Friendly Merino Blend

    Made with sustainably sourced Merino wool and performance yarns — soft on skin, lighter on the planet.

    Advanced Technology for Unmatched Warmth & Comfort

    How HygroHeat™ Works

    •   Patented Thermal System

      HygroHeat™ is Laetts’ patented thermal technology that generates warmth through
      ceramic particles embedded directly into the yarns.

    • FIR-Emitting Ceramics & Reflective Design

      These particles emit far-infrared rays (FIR) to support circulation and thermal
      retention during activity. The visible white line on the sock is woven with
      reflective yarns that return body heat inward—no batteries, no external power.

    • Performance Warmth, Up to 8.8°C Warmer

      Lab-tested to retain heat better than leading ski sock brands, Laetts’
      HygroHeat™ keeps feet up to 8.8°C warmer.

    • Lightweight Comfort Without Bulk

      All the warmth—without heavy layers. Designed to provide extended comfort in
      ultralight constructions.