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Kepler Boxers [Mens]pure merino boxer shorts

Premium New Zealand merino technical baselayer shorts that wicks moisture away from the skin and dries fast. They are a slim fit and body hugging to allow you to layer with comfort

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Kepler Boxers [Mens] pure merino boxer shorts

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If you are going to dress for performance you need to make sure you get it right from the inside out. There is no point wrapping yourself in high performance fabrics only to leave a pair of low tech cotton pants underneath it all! 

Our boxers are made with soft merino jersey which wicks moisture away from the skin and dries fast. They are a slim fit and body hugging to allow you to layer with comfort. The high waist line means that the shorts can be pulled up away from the pinch point where other garments in your layering system might sit. A wide elasticated waistband helps avoid uncomfortable abrasion points when wearing a rucksack and stops the shorts riding down to expose skin to the elements when riding your bike or reaching up to that distance hold. 

The benefits of Merino
Kepler is made using only the finest sustainably sourced non-mulesed New Zealand merino.

Merino wool is a natural material with properties that make it ideal for the changeable conditions you will experience during mountain activities, maybe that’s why New Zealand Merino sheep look so content strutting around their hillsides. 

When you are on a mission you don’t want to be changing your layers with every turn in the weather. When it is cold Merino keeps you warm by trapping small pockets of air within its fibres. When its warm the same fibres will help to whisk moisture away from your skin so it can evaporate back into the water cycle! If you have been trapped in your garment for several days the antibacterial properties of a chemical called lanolin will help you stop ponging.

Merino baselayer won’t make you fitter, it won’t make you go faster, but it will help you feel more comfortable when you find yourself in uncomfortable circumstances.

Key features
  • 100% Genuine New Zealand mulesing free Merino
  • Moisture-wicking and breathable
  • Lightweight and quick-drying
  • Merino wool minimises odours
  • Flatlock stitching sits nicely next-to-skin for comfort
  • Anatomical fit for performance
  • High warmth-to-weight ration even when wet
  • High elasticated waist band
  • Gusseted crotch
Vital stats

160 gsm Merino jersey
17.5 Microns

Origin: China

Looking after your lightweight merino baselayer ?The better you look after this merino baselayer the better it will look after you. Cleaning can be done in luke warm handwash (or gentle machine wash). Merino can and does develop holes the more adventures you go on, so darn these up as soon as you can, othersise they will get bigger and you’ll be needing a new one! Common causes include snagging, vigorous machine washing, putting your finger through them when pulliing them on and hungry moths.

Same day despatch

All orders received before 2pm despatched same day.

Free UK Shipping on all orders

Free 2 day delivery to UK addresses is included in all orders so the price you see is the price you pay. Upgrade to next day at the checkout.

Free No hassle 123 Day Returns

Buy with confidence and if you are not happy, change your mind or want a swap for any reason then return it for free and we will exchange or refund no question. The price you see is the price you pay. Just return the kit as you receive it - in its original condition, unused, unworn, with original packaging and fit for resale.


We offer a range of finance options from 0% to 9.9% starting on orders over £500. Please give us a call on 01773 417007 to apply for finance. Our customer support heros will take your order and talk you through the quick and easy application process.

Alpine Bond

If one of our products does not meet your expectations upon delivery or, if it does not live up to the demands placed upon it, please return it within 3 years of purchase for repair, replacement or refund. If the problem is our fault then we will do this to your satisfaction if it’s your fault then we will help out the best we can.

Support - There are five ways to get in touch

Related content
Mens sizing
Chest (inches) 37" 40" 43" 46" 49"
Waist (inches) 30" 32" 34" 36" 38"

These size charts show the body measurements that an Alpkit garment of a given size is designed to fit. They are not actual garment measurements. Measure yourself as described below, and use the size chart to find your size.

Chest: measure around your chest at the widest part. The tape measure should pass under your arms, and be level from front to back.
Waist: measure around your waist at the narrowest part.
Hips: standing with your feet together, measure around your hips at the widest part.

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3 Reviews


Used this product?

Write a review
John O
Short in the leg

The first pair that I bought were great, quite long in the leg so no issues with riding up while walking/climbing. Liked them enough to buy another pair. However the second pair fits completely differently, much shorter in the leg, and more prone to riding up uncomfortably.
If second pair were like the first then I would be very happy with them.

Charles B

Decent enough and do what they say but they fit more like hipster undies, which makes them feel too short at the waist. If they came up a bit more they would be spot on.

Stu Farrell
Mens Kelper Boxer Shorts

Just completed the Trailwalker 2016 event in these, so I walked for 100km in just under 24hours wearing the Kepler shorts. I have to admit they were a panic purchase and a bit of a luxury at the price with the worry of being uncomfortable for that amount of time.
I found the material and the fit absolutely spot on. The problem I had with them though was the seam going between my buttocks. Unfortunately the seam didn't go nice places or do nice things with it constantly riding up in between. It wasn't a massive hinderance but more of a constant niggle I was always aware of.
I also forgot to pack any fresh underwear for the following day so was stuck in the Keplers for over 48 hours and no unpleasant scent.
On the whole a good product with a strange seam placement but knowing Alpkit they had a good reason.



Kepler Merino Review in Velome

Mountain biker Jessica Strange puts our Kepler Merino top to the test in South Wales

The top is really lightweight, soft and totally breathable which is ideal for a day's riding as I felt both warm and "airy"


my Alpkit Merino wool layer whist riding was really comfortable


Great quality, fit and features


Velome September 2015 - Jessica Strange


Wild Running Top Mens Winter Running Gear

Sim Bensons ideal winter running gear

Merino wool base layers are normally the warmest, and as long as they are ethically produced you can feel happy wearing a natural fibre. I wear either my Alpkit Kepler (RRP £29) or my Howies short-sleeve base layer (RRP £45) pretty much all the time. They look great as well as performing brilliantly in all but the warmest weather. Synthetic base layers dry faster than Merino, but Merino retains its warmth even when wet

Sim Benson

Wild Running October 2015 - Sim Benson


Women Climb Kepler Merino Top Review

I love the design of this women specific base layer top. It looks as good on its own after a hard day of climbing as it does at the crag under all your layers. The people at Alpkit have clearly thought about every aspect of this garment and tested it out to create a beautifully designed and functional garment that is perfectly fit for purpose

Emily Pitts

WomenClimb October 2015 - Emily Pitts