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Merinotec™ Maximum Thermal Long Johns

Product code: T149009A

About this style

Stay cosy in luxurious comfort with these Merinotec™ long johns from our Autograph collection. Made from an innovative merino-rich fabric, this thermal underwear helps regulate your temperature while wicking away moisture to keep you dry. Perfect as a base layer for winter and cold weather conditions, the regular fit with added stretch and flexible elasticated waistband offers easy movement, while the seamless design ensures a smooth finish. A button fly adds a practical touch to this thermal clothing. Autograph: Premium investment pieces featuring contemporary cuts and refined finishing touches.

Autograph

Merinotec™ Maximum Thermal Long Johns

€45

Colour

Size

Also available in: Short Sleeve and Long Sleeve Top
Free standard delivery over €75

Reviews (10)

4.1

70% Recommended this product

Mentions
18 February 2026footwearenthusiast

Perfect!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Bought for my husband for our skiing trip. He says they're super comfy, super warm and super cosy - he loves them!

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

15 February 2026Carstev

Great fit

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Nice and warm for those chilly winter days and nights

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

26 January 2026Jasminish

A good quality and comfortable garment

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Lives up to its promise, lighweight but warm and very comforatble

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

24 January 2026Thedoyles

Lightweight but warm and comfortable

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Light, Warm and comfortable. Bought for my father for a trip to the Arctic Circle. He wore them every day and loves them, even wearing them under jeans on cold days at home due to their lightweight fabric.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

30 December 2025Yorkie2015

Excellent product but expensive

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

Excellent product but somewhat expensive for what they are. I have purchased many thermal heatgen products from M&S recently and whilst they others are thicker material wise, these are much thinner but perform as well. If they were more reasonably priced I would buy more of this product but they are very expensive for what the are and I’m not normally a person who complains about pricing.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

22 December 2025Jeanwiz

Warm thermal

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Reasonable but already has a hole/ladder in leg but very warm

Helpful?

10 December 2025Josephjames

Very thin.

Originally posted on marksandspencer.com (UK)

Not happy with them as very thin and not very warm

Helpful?

02 November 2025Celtbud

Nice quality, needs stronger elastic

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Nice quality but the waist elastic does little to keep them in place. Constantly pulling them back up

Reviewer Ratings

Comfort

Good

Helpful?

Reviewer Ratings

Comfort

Good

03 October 2025Jim54

Good quality but sizing is on the small side

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Definitely keep me warm, though I usually wear medium size, they were quite tight and I should have ordered large

Helpful?

21 February 2025EmmaBig

Not as described

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

Neither thermal nor seamless. Described as "without side seams". Untrue they are the same as cotton version. Silky soft and sleek but minimal additional insulation

Reviewer Ratings

Quality

Excellent

Value for Money

Average

Style

Excellent

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Average

Style

Excellent

How do you feel about the size?

True to size

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