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LAPASA Men’s 100% Merino Wool Base Layer Set, Thermoflux M31, Dark Heather Grey, M

£74.99 (as of 22/10/2026 10:24 BST - DetailsProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.)

LAPASA Men’s Thermoflux M31 base layer set includes a long sleeve top and bottom in Dark Heather Grey, size M. It is made from 100% merino wool, with the M31 warm variant listed at 200g/m² and care guidance for wool wash or hand washing.

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Quick Summary

The LAPASA Men’s 100% Merino Wool Base Layer Set is a long sleeve thermal underwear top and bottom set in Dark Heather Grey, size M. It is the Thermoflux M31 variant and is described as breathable and soft.

This base layer set is made from 100% natural and superfine merino wool from Australia, and the description also states that it is certified STANDARD 100 by OEKO-TEX.

Who It Is Best For

This set is for men looking for a merino wool thermal base layer in size M. It is also aimed at buyers comparing the M31 warm variant with the M126 extra warm version, so checking the correct thickness before ordering matters.

Key Details

DetailVerified information and buyer relevance
BrandLAPASA.
Product typeMen’s base layer set with a long sleeve top and bottom thermal underwear.
VariantThermoflux M31 warm variant, listed as 200g/m² merino wool.
ColourDark Heather Grey.
SizeM.
Material100% merino wool, described as superfine and natural.
CertificationSTANDARD 100 by OEKO-TEX is stated in the description.
CareMachine wash on wool programme with wool detergent at a maximum of 30 degrees, or hand wash if needed.

Why Buyers Choose It

  • 100% merino wool gives a natural wool base layer option for cold-weather wear.
  • The M31 variant is identified as the warm version, which helps when choosing between the two stated thickness options.
  • Long sleeve top and bottom coverage suits buyers wanting a complete thermal underwear set.
  • The care guidance gives a clear washing method to check before buying.

What To Know Before You Buy

Check the selected variant carefully, as the listing also refers to an M126 extra warm version and the M31 warm version. This item is the M31 set in Dark Heather Grey and size M.

Review the washing instructions before ordering if you need a base layer that fits your preferred laundry routine. The set is described as suitable for outdoor activities including camping, hiking, cycling, skiing, snowboarding and horse riding.

Common Buyer Questions

Is this a full set?
Yes. It includes a long sleeve shirt and leggings as a thermal underwear top and bottom set.

Which thickness is this version?
This is the Thermoflux M31 warm variant, listed at 200g/m² merino wool.

How should it be washed?
Use a wool wash programme with wool detergent at a maximum of 30 degrees, or hand wash if your machine does not have a wool programme.

Is the exact colour and size shown?
Yes. The listed variation is Dark Heather Grey in size M.

Final Buying View

If you want a men’s merino wool thermal base layer set in the M31 warm version, this is the Dark Heather Grey size M option to compare carefully before ordering. Confirm the thickness, colour and size suit your needs.

Brand

LAPASA

Manufacturer

LAPASA

Product Group

Apparel

Model

M31

Color

Dark Grey – Lightweight

Is Adult Product
Size

M

Number Of Items

2

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