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5 Pack 360 Flex Horizontal Fly Longer Length Trunks

Product code: T145407A

About this style

Introducing our five pack Horizontal Fly trunks. Our exciting new Horizontal fly is positioned across the front of the underwear, carefully engineered to provide easy access for convenience. Made in a regular fit with longer length leg, from our 360 Flex modal rich fabric that provides four-way stretch, so it moves with you for greater comfort. Lycra® Xtra Life™ helps your underwear keep their shape over time, whilst our StayNew™ finish maintains the colour and texture, wash after wash. Autograph: premium investment pieces featuring contemporary cuts and refined finishing touches.

Details & care

Style

Regular fit

Elasticated waist

Added Stretch

Composition

93% modal, 7% elastane lycra (exclusive of trimmings)

Care

Wash at 40°C

Do not bleach

Tumble dry low temperature

Iron at low temperature

Do not dry clean

Autograph

5 Pack 360 Flex Horizontal Fly Longer Length Trunks

£38

Colour

Size

Also available in: Trunks
Free standard delivery over £75

Reviews (16)

4.8

81% Recommended this product

Mentions
12 May 2026Yayahaze
Verified Purchase

Disappointing quality

No, I don't recommend this

Fit is good but poor stitching seems flimsy and waistband has come away on one pair already.

Reviewer Ratings

Comfort

Average

Helpful?

Reviewer Ratings

Comfort

Average

11 May 2026Guncle Timmy
Verified Purchase

Perfect Underpants

Yes, I recommend this

Sincerely thankful M&S is offering these horizontal fly trunks in this longer length. I’ve long had these type of fly pants whilst living in the States and had been unable to find similar of a decent quality in the UK. These long trunks are better than all I’ve had and are a truly great value. So much more reasonable and comfortable than alternatives available elsewhere. The waistband does not roll, the legs do not bind or, more importantly, ride-up. They wash and dry beautifully. I only wish they were offered in similar colours as the much shorter trunks. I hesitated to recommend them so they will not sell out. Will be ordering more.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

29 April 2026DPH1
Verified Purchase

Longer length trunks

Yes, I recommend this

Nice items. Not in stock locally, but available for collection from the next day. Good length and comfortable

Helpful?

16 April 2026Delarni
Verified Purchase

No chaffing!

Yes, I recommend this

Bought these to wear when working in 34 degrees! Perfect.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

14 April 2026eddiston232
Verified Purchase

Good purchase let down by delivery times

Purchase good but delivery absolutely shocking, took over a week, delivery company in our area has pretty poor reviews so not M&S fault directly but they should stop using them!

Helpful?

29 March 2026freesiafreak
Verified Purchase

stops chafing and comfortable to wear. Easy care

Yes, I recommend this

very good quality hopefully will last and wash well

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

19 March 2026Partner226
Verified Purchase

Comfortable and good fit

Yes, I recommend this

My husband says the longer legs are much better fit.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

26 February 2026Quible
Verified Purchase

Would recommend

Yes, I recommend this

Brilliant fit, comfortable and nice material. Will buy more.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

17 February 2026CRMG
Verified Purchase

Perfect for working out!

Yes, I recommend this

Great for running, soft and supportive material, longer length is perfect.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

01 February 2026Jonoh12
Verified Purchase

Great fit

Really soft and comfortable and keep everything held in place

Helpful?

25 January 2026LeonRw
Verified Purchase

Nice and comfortable.

Yes, I recommend this

I like the way these fit round the thigh and come down the leg further than most.., they’re a nice material and comfortable..

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

19 January 2026Radio ham 1
Verified Purchase

Good quality an fit but the fly a bit odd

Yes, I recommend this

Very good quality but slightly different long leg from previous purchase

Helpful?

11 January 2026Pdmsix
Verified Purchase

Horizontal fly is a god send!!

Yes, I recommend this

Great quality boxers, the horizontal fly is a god send, used to buy a another brand with horizontal fly but that brand doesn't sell them anymore. These are great. My only critique is the front bulge bit needs to be a bit bigger. Other than that perfect.

Reviewer Ratings

Comfort

Good

Helpful?

Reviewer Ratings

Comfort

Good

11 January 2026EB007
Verified Purchase

Mens underpants

Yes, I recommend this

Bought for my son at Christmas, he was very pleased.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

02 January 2026Deborah Teilelbouim
Verified Purchase

Excellent trunks!

Yes, I recommend this

Best trunks available, nice long leg length and really comfortable

Helpful?

30 December 2025Izureru
Verified Purchase

I’d recommend

Yes, I recommend this

Great Quality and comfortable also practical and looks great (I am told)

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

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