Forclaz Trek 500 Merino Wool Backpacking Tights Review

Overview

The Forclaz Trek 500 Merino Wool Backpacking Tights are Decathlon’s women’s wool bottoms for cold camps, sleeping, and layering under rain pants or shells. They pair 86% ultra-fine merino with a close fit and a mesh panel behind each knee. The trade-off is weight and coverage: at 247 g they are not a featherweight long john, and some owners find the fabric sheer.

Key Specs

Spec	Detail
Weight	247 g (8.7 oz, size S)
Fiber content	86% merino wool
Wool fineness	18.5 micron, ultra-fine
Fabric weight	190 g/m²
Yarn construction	Wool fiber wrapped in polyamide yarn for abrasion protection
Ventilation	Mesh insert behind the knees
Category	Base layer, women’s tights
Fit	Close-fitting

Performance

Warmth. At 190 g/m², the knit sits in the midweight range, which is the sweet spot for shoulder-season hiking, camp evenings, and sleeping. Owners on Decathlon’s product page describe them as warm yet light and breathable. One reviewer wore them under waterproof pants while snowshoeing, a context where sweaty legs usually go cold fast. Another used them on an Iceland trip and reported that they stayed warm after sweating and dried quickly. A third called them excellent for sub-zero temperatures and thin enough to wear under trousers.

Moisture and odor. Wool’s usual advantages apply here. Decathlon’s pitch is that merino holds body temperature after heavy perspiration, while synthetics let it drop faster. Wearers report no unpleasant odor, which is the main reason to carry wool on a multi-day trip. Fewer changes of clothing means a lighter pack. The mesh insert behind the knees is a small but sensible piece of design. Knees are where heat and moisture collect on a climb, and the panel gives them somewhere to go.

Softness. The 18.5-micron wool is fine enough to wear against bare skin without itch. Decathlon recommends washing before first wear for a softer hand.

Durability. Merino is delicate at the thigh and seat, where pack hip belts and rough rock rub. Forclaz addresses this by wrapping the wool fibers in polyamide yarn, a construction meant to protect them from abrasion and snags without sacrificing the wool’s properties. Care matters too. One owner cautioned against washing at high temperatures, which is standard advice for any wool garment.

Coverage. The one recurring complaint is sheerness. A reviewer who otherwise rated the tights highly noted that they are somewhat see-through and should be treated strictly as a base layer, not worn alone as pants. That limits their use as around-town leggings, whatever the marketing might suggest.

Weight. At 247 g, the tights are not the lightest wool bottoms available. Ultralight hikers who count every gram will find thinner, sub-200 g options, and earlier coverage by Halfway Anywhere listed a lighter figure for an earlier iteration. For a dedicated sleep or camp layer, the extra grams buy meaningful warmth.

Value. Decathlon’s page shows a 4.7 out of 5 average across roughly 800 ratings, with 668 of them at five stars and only 22 at one or two stars. That is a strong showing for merino at this price tier, where wool bottoms from specialist brands often cost far more.

Pros & Cons

Pros

• Ultra-fine 18.5-micron merino that owners describe as soft and itch-free
• Good warmth for the weight in cold, damp conditions, including sub-freezing use
• Mesh knee panel improves ventilation where heat builds up
• Polyamide-wrapped yarn adds abrasion protection to a fiber that needs it
• Low odor over multiple days of wear
• Strong owner ratings relative to price

Cons

• 247 g is heavier than the lightest wool bottoms
• Sheer enough that it is best worn under something
• Needs gentle, cool washing to avoid damage
• Midweight knit may run warm in genuine summer heat

Who Should Buy This

Women who want a warm, odor-resistant layer for shoulder-season backpacking, winter day hikes, snowshoeing, or sleeping will get good use from these. They suit hikers who prefer shorts by day and tights for cold mornings and camp, and anyone who wants to carry fewer clothes over a long trip. Gram-counters chasing the lowest possible base weight, and anyone who wants a legging that works as outerwear, should look elsewhere.

Verdict

The Trek 500 Merino Tights deliver real merino warmth, softness, and odor control at a price that undercuts most specialist wool. The weight and the sheer fabric keep them from being an ultralight standout, but for a cold-weather sleep and camp layer, they are a sound and well-reviewed buy.