Free shipping from 35,- Save up to 40% with the Meister discount Unique Mellowood® fabric The Next Step in gentlemen's underwear Maximum premium, maximum sustainable

Undiemeister® Red Boxer short Reef Clay

The color of the Undiemeister® Red Boxer Shorts "Reef Clay" is chosen from the thousands of shades of the coral reef. Beautiful deep red, obviously made from the revolutionary Mellowood®.


(from 14.99 with the Meister volume discount)

Pick color: Red
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  • Undiemeister-mellowood-sea-breeze side-boxershort
  • Undiemeister mellowood highland moss side boxershort
  • Undiemeister-Mellowood-storm-cloud-blue-side-boxershort
  • Undiemeister-Mellowood-lavarock-gray-side-boxershort
  • Undiemeister-Mellowood-misty-forest-green-side-boxer-short
  • Undiemeister-Mellowood-reefclay-red-boxershort-side-boxershort
  • Undiemeister-Mellowood-vulcano-ash-black-side-boxer-short


10% discount

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30% discount

40% discount

More articles, fewer shipments, less CO2. This means you receive a discount.

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The unique features of Undiemeister® Boxer shorts

Underwear, like our Undiemeister® Red Boxer Shorts Reef Clay, you wear all day. And also directly on your skin. The textile therefore determines the quality. That is the basis. Boxer shorts made from the revolutionary Mellowood® textiles offer the following unique features:

    • Silky Soft
    • Does not pill
    • Anti-transpirant
    • Maximum ventilation
    • Colorfast, even after washing
    • Hypo-allergenic and antibacterial
    • Hardly any shrinkage
    • Temperature regulating

The new Mellowood® combines all these unique properties in one fabric. The natural fibers from Beechwood are the result of years of research. Combined with organic cotton, a unique fabric has been created, perfectly balanced: Mellowood®.

Maximum CO2-poor production completes that balance. And that is exactly the balance you want, good for everyone. Undiemeister® is therefore proud to be the only one, exclusively for the Netherlands, to be able to offer Mellowood® boxer shorts (if you want a quick comparison between Mellowood® and other textiles are useful, read on this Mellowood® page).

Premium Mellowood® textiles require premium finishes.

Items made from Mellowood® deserve the best possible finish. Premium is part of premium. Our boxer shorts are made without unnecessary stitching and seams. On the back, the boxer shorts are even completely seamless. So no seam that runs over the buttocks, which could bother you when you sit.

Also on the sides no seams. The seam finish around the crotch is a so-called “flatlock stitching on the inside”. Also a detail that you do not see everywhere. This type of stitching does not mar the exterior, while the comfort is maximized. The seam finish on the bottom of the legs, the so-called “hemming”, is also flatlock on the inside.

The fabric around the cross is double-edged. A so-called “Double Layered Pouch”, so that everything stays where it belongs, if you understand what we mean. Under the crotch, on the inside of the legs, extra reinforcement has been added, by adding a “Seperate Crotchpart”. This is where boxer shorts are under most pressure, due to the movement of the legs. That is why you quickly see holes there, which is prevented as much as possible in this way.

You don’t want to feel the hip band of the boxer shorts. We have therefore had the inside brushed. This creates a terry-like, super soft fabric.

All boxer shorts are equipped with long legs.

Undiemeister - Boxer shorts - Benefits

Undiemeister® red boxer shorts Reef Clay: discreet and quiet.

Natural colors provide an inexhaustible source of inspiration. The color palette in almost infinite. The color Reef Clay is chosen from the many colors that the coral reefs offer us. Diving or snorkeling you imagine yourself in a fairyland, so beautiful are all shades. Coral in all shapes and sizes, with schools of fish in between, looking for food. Let’s keep it that way, because there is less and less coral. The beautiful deep red color is extended to the hip belt, creating a calm and restrained look.

The Mellowood® range from Undiemeister®.

Boxer shorts
The Undiemeister® boxer shorts are also available in the colors Lava Rock (gray), Misty Forest (green), Vulcano Ash (black),  Storm Cloud (blue) and Reed Clay (red).

Round neck T-shirts and V-neck T-shirts.

The Undiemeister® T-shirt range consists of round neck and V-neck T-shirts, which are available in the colors Chalk White (white), Volcano Ash (black) and Storm Cloud (blue).

Deep V-neck T-shirts

The Undiemeister® T-shirts with a deep V-neck will soon also be available in the colors Chalk White (white) and Desert Sand (khaki).

If you know what’s good for you, go with Undiemeister®. If you want a better planet, do the same.

We hope you enjoy wearing them.

Additional Information

About Undiemeister

Undiemeister is The Next Step in gentleman’s underwear. Revolutionary, incredibly comfortable and stylish. Made of Mellowood®, incomparable top quality. Colours inspired by nature and the most durable option available. There is no alternative to Undiemeister’s Mellowood®.

Underwear 3.0!
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Ultra soft and comfortable underwear. And responsibly produced too. Awesome!
Undiemeister beats the bamboo
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You almost forget to take them off to wash, they are so comfortable
M van Geet
Happy with Undiemeister!
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Good information. Fast service and accurate delivery. The underwear fits and feels perfect. I'm happy with it.
Paul van weerdenburg
Expensive but good
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Excellent quality
Pricey but if something goes wrong it is solved nicely
Best shirts
Have tried everything
J.T.J. Bartels
Beautiful boxer shorts
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Beautiful boxer shorts. Good quality. Great fit. Delivery as agreed. Very satisfied.
Paul de Kleijn
I have good experience with undiemeister so far
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I have good experience with undiemeister so far. After I ordered the wrong size, I returned the items and the amount was credited within a week, you will also receive an answer within a day in the communication via email.
Janny Stappers
Beautiful material
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Wonderful material, looks beautiful and comfortable. I don't wear them myself but my husband confirmed the shorts and shirts are lovely to wear.
Good, fast service too!

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Maattabel en wasvoorschriften


Undiemeister -Size chart -Boxershort
Maat Taille (cm) Heup (cm)
XS 78-84 90-94
S 84-90 95-99
M 90-96 100-104
L 96-102 105-109
XL 102-108 110-114
XXL 108-114 115-119
XXXL 114-120 119-123


Maat Borst (cm) Lengte (cm)
S 92-96 70
M 97-101 72
L 102-106 74
XL 107-111 76
XXL 112-117 78


Je kunt de producten van Undiemeister het beste wassen op 30 graden, met niet teveel toeren. Niet laten stomen. Beter niet in de wasdroger en als je wilt strijken: lage temperatuur. 

Size chart and washing instructions

Boxer shorts

Undiemeister -Size chart -Boxershort
Size Waist (cm) Hip (cm)
XS 78-84 90-94
S 84-90 95-99
M 90-96 100-104
L 96-102 105-109
XL 102-108 110-114
XXL 108-114 115-119
XXXL 114-120 119-123


Size Chest (cm) Length (cm)
S 92-96 70
M 97-101 72
L 102-106 74
XL 107-111 76
XXL 112-117 78

Washing instructions

It is best to wash the Undiemeister’s products at 30 degrees, not too many cycles. Do not dry clean. Avoid tumble drying and if you need to iron them: use a low temperature