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Kepler Short Sleeve [Mens]pure merino base layer

Thermal and anti-microbial merino base layer tee, for warmth, freshness, and next-to-skin comfort in cooler climates

kepler short sleeve merino base layer grey /gray
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    Tarmac - Nemo
  • Nemo - kepler short sleeve merino base layer nemo blue
  • Nemo - Tarmac - kepler short sleeve merino base layer nemo blue
    Nemo - Tarmac
  • Seagrass - Tarmac - kepler short sleeve merino base layer seagrass  tarmac
    Seagrass - Tarmac
1. Colour / Size
Fitting guide
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Whether you’re hiking a GR route on the continent, biking through Scotland, or heading out for the Alpine summer, your base layer should keep you comfortable and warm no matter what the weather decides.

A multi-day trip doesn’t have to leave you with a humungous pile of laundry to get through. Thermoregulatory, anti-microbial, UV protective, and exquisitely soft, the Kepler base layer range is made to keep you comfortable and fresh on longer trips across a wide range of temperatures.

Flatlock seams and an anatomical cut enhance the natural next-to-skin comfort of merino. Kepler is designed to have a flattering fit that isn’t too ‘base layery’, so you’ll fit right in at the pub after a day on the hill.


The Kepler range uses beautiful, ultrafine merino for a luxuriously comfortable next-to-skin feel.

With thermoregulatory and anti-microbial properties, merino wool is more than a match for day-in, day-out use across the temperatures in changeable mountain conditions, help you to stay fresh, comfortable and protected no matter what the weather decides.

We use 100% natural New Zealand merino from non-mulesing farms.

Key features
  • 3 Year Alpine Bond
  • Short-sleeved ultrafine merino base layer
  • Shorter sleeves improve ventilation and articulation
  • Ultrafine merino for softness and comfort
  • Anatomical cut and flatlock seams feel great next to the skin
  • Merino wool minimises odours
  • High warmth-to-weight ratio
  • New Zealand merino from 100% non-museling farms
More images
Vital stats

Fabric: 100% New Zealand merino, 160 gsm, 17.2 microns
Seams: Flatlock stitching


Weight: S: 140 g; M: 160 g; L: 170 g; XL:175 g; XXL: 195 g

Origin: China

Product Care Information

The better you look after this merino garment, the better it will look after you. Give your Kepler a long, happy life with these tips:

  • Hand wash your merino in lukewarm water, or gentle machine wash.
  • Darn any holes as soon as possible so they don’t grow.
  • Avoid snagging, vigorous machine washing, putting your finger through the fabric, and hungry moths.
Men's sizing
Chest (inches) 37" 40" 43" 46" 49"
Waist (inches) 30" 32" 34" 36" 38"
This size chart indicates the body measurements our garments are designed to fit. 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.


The base of all layering

Start from a good base from which to build up your flexible layering solutions


Merino Wool vs. Synthetic

Designer Ronnie explains how to choose between synthetic and merino garments


Scottish Suffering

Scottish winter climbing has its discomforts. Support Hero, Fran gives us the low-down on his top kit for making it a little more comfortable.


Ultralight Long-Distance Bikepacking: What to Pack

The geeky bit... Adventure Pedlar's Pete McNeil tells us what kit worked for him on his sub-5-day Highland Trail 550


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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.


2 Reviews


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Great base layer for hiking.

My go to hiking base layer for any type of weather. Keeps you warm and dries fast. Highly recommended.

Great fit

I am 6', 39"chest and 31" waist - no I have not mistook Alpkit for a dating site! I chose the small size and this fits perfectly, close but not tight, perfect for adding more layers on top when needed. The quality is great and the price too.



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

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Second Summit Kepler Review

Second Summit put Kepler to the test

Hard to beat for the money. Well made, warm, dries well, comfortable and stays odour free. Great product from Alpkit, and one that would be well used on multiday trips. Order a size down if you like athletic fit.

Second Summit

Second Summit February 2016 -


Wild Running Alpkit Kepler Top Kit

Jen Benson reviews her favourite running kit including Alpkit Kepler pure merino top

The Alpkit Kepler (RRP £29) comes in both short- and long-sleeved versions and provides a toasty base for any layering system

Jen Benson

Wild Running October 2015 - Jen 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


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