Men's Seamless Thermal Long Johns SeamFlex CXS

Men's Seamless Thermal Long Johns SeamFlex CXS
Men's Seamless Thermal Long Johns SeamFlex CXS
Men's Seamless Thermal Long Johns SeamFlex CXS
Men's Seamless Thermal Long Johns SeamFlex CXS
CA1740041
In stock: Ships within 48 hours
€25.90 TTC
Shipping 24/48 H
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  • Black
SELECT YOUR SIZE
  • M-L
  • 3XL-4XL
  • XS-S
  • XL-2XL

Tarif dégressif dès 2 pièces 23,83 € · dès 10 21,24 €
 

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SUMMARY

Legs are the most neglected part of winter kit: three layers on the upper body, a single pair of trousers below. The SeamFlex long johns are knitted seamless, with no inside leg seam — the one that rubs with every step.

Its polypropylene-based fabric moves moisture out to the surface of the knit and dries fast. The stretch knit follows the bend of the knee without pulling at the ankle. Double sizing from XS-S to 3XL-4XL.

Base layer down to −10 °C / 14 °F, to be worn under trousers.

TECHNICAL DESCRIPTION

Men's Thermal Long Johns SeamFlex — CXS

Protection Cold
Use 1st layer
Construction Seamless
Thermal protection −10 °C / 14 °F*
Warmth Insulated legs, with no bulk

It follows the leg without marking the skin, even after twelve hours on your feet

The legs are the most overlooked part of winter kit: people build up three layers on the upper body and keep a single pair of trousers below. The SeamFlex long johns are knitted seamlessly, which removes the inside leg seam — the one that rubs with every step and ends up irritating the skin. The fabric uses polypropylene-based fibres, light and quick drying, which move moisture out to the face of the knit. The stretch knit follows the bend of the knee without pulling at the ankle.

Grand-Froid expert's view

Packing for a cold-weather trip, this is the item people leave out and then wish they had. It takes up less room than a pair of socks and completely changes how a day outdoors feels. The seamless build avoids chafing on the inner thigh over a long walk. Take two: wash one in the evening and it dries overnight.

Men's thermal long johns CXS SeamFlex, seamless knit
What is it designed for?

Long johns earn their place in any situation where the legs stay exposed for hours, and above all when you are standing still: that is when the lack of insulation on the thighs starts to tell.

  • Long spells standing still: markets, loading bays, security work, where the legs produce no heat
  • Under work trousers or jeans: with no bulk, it does not change the fit of the trousers
  • Travelling somewhere cold: Finland, Quebec, Iceland, where time spent outdoors runs into hours
  • Winter walking and long days out: the stretch knit follows the bend of the knee with no pressure point
  • Sensitive skin: with no inside leg seam, the rubbing that causes irritation is gone

Thermal protection

The thighs carry a large muscle mass and a considerable area of skin, which makes them a major source of heat loss the moment they stop working. A thin knit against the skin creates a still layer of air that the trousers hold in place, and it is those few millimetres that separate a cold leg from a comfortable one. Polypropylene-based fibres take up very little water, which avoids damp fabric against the skin after a climb or a brisk walk. Long johns do not stop the wind.

Technical specifications
  • Seamless knit, with flat seams wherever the construction calls for them
  • 66% polypropylene, 30% polyamide, 4% elastane, 220 g/m²
  • Moisture is carried from the skin to the face of the knit
  • The fabric helps limit odour over long wear
  • Stretch fabric, a snug fit that follows the bend of the knee
  • Quick drying
Composition
  • 66% polypropylene, 30% polyamide, 4% elastane, a 220 g/m² knit. Polypropylene takes up almost no water and moves moisture out to the face of the knit. Polyamide gives the knit its tensile strength and its shape retention. Elastane provides the stretch that lets the fabric follow the leg.
Size guide

Sizes are doubled: one garment covers two sizes, thanks to the stretch of the fabric. Take the one closest to your usual size. The measurements are those of the garment laid flat, at rest and unstretched.

Size (cm) XS/S M/L XL/2XL 3XL/4XL
Total length 87 89 91 93
Waist, flat 30 35 40 41
Hips, flat 36 41 46 50

Measurements in cm, taken flat. Tolerance ± 5%.

Care & Durability
  • Wash at 30 °C / 86 °F, on a delicate cycle
  • No bleaching, no tumble drying, no ironing, no dry cleaning
  • Wash without fabric softener: it leaves a film on the fibre and blocks the movement of moisture
  • Dries quickly in open air, so a tumble dryer serves no purpose anyway
  • Wash separately from anything with zips, which snag the knit
Return or exchange — 30 days
You have 30 days after receipt to request a return or exchange for this item.

Why choose the SeamFlex long johns?

Because the legs are the most overlooked part of winter kit, and because the seamless build removes the inside leg seam, the one that rubs with every step.

The three-layer system:

  • 1st layer — base (what this product does): against the skin. Holds body heat, moves perspiration outwards.
  • 2nd layer — mid: fleece or light down jacket. Insulates and holds warm air around the body.
  • 3rd layer — outer: parka, softshell or padded gilet. Stops the wind and keeps the heat in.

Three layers go on the upper body and one on the legs: that is usually where the cold gets in.

* Indicative temperature. Perceived warmth varies with activity, body type, humidity, wind and the layers worn over the top.

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