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Kepler Long Sleeve [Womens] pure merino long sleeve base layer

Breathable and comfortable long-sleeved premium New Zealand merino base layer for demanding sports in hot, cold, wet or dry

womens thermal long-sleeved merino baselayer kepler seagrass
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1. Colour / Size
Fitting guide
8 10 12 14 16
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8 10 12 14 16
8 10 12 14 16

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Alpine summer, Scottish winter, autumn on the gritstone… Those merino sheep have catering for every climate down to a T.     

We use 100% genuine superfine non-mulesing New Zealand merino wool to ensure our Kepler long-sleeved top deserves a place in everyones outdoor layering system.

The lightweight baselayer top is a staple piece of most peoples layering systems. Kepler fits right in there with its excellent performance over a vast range of conditions. Quite simply it is a garment that does many things really rather well. Breathable, wicking, fast drying and famously odour resistant, merino can be worn in the hot, in the cold, in the wet and in the dry.

For all round comfort over extended durations merino is our baselayer of choice.

Thumb retainers in the cuffs stop the arms riding up to expose your wrists to the cold, useful when your activity involves a lot of reaching.

Flatlock seams and an anatomical cut enhance the natural next-to-skin comfort of merino. 


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
  • Long-sleeved ultrafine merino base layer
  • Longer sleeves give added coverage and protection
  • Thumb loops keep sleeves in place
  • 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: 8: 144 g; 10: 152 g; 12: 161 g; 14: 177 g; 16: 186 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.

Size chart
Women's sizing
8 10 12 14 16
Chest (inches) 32" 34" 36" 38" 40
Waist (inches) 25.5" 27" 29" 31" 33"
Hips (inches) 35" 37" 39" 41" 43"
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.
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What You Say: Customer Reviews and Comments

4 Reviews


Used this product?

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My first merino top

Any wool has been a no go area most of my life. I was convinced by the 'non-itch' blurb and it is true - I wear this as an baselayer when walking, under jumpers and on it's own as it looks good. MORE COLOURS PLEASE - HEATHER, LAVENDER, BLACK, GREY


Am size 10 and this was perfect

Warm, fast dry.

Good, No smells, it's no fit like short t shirt.


Bought 3 of these for the other half as I was really pleased with the 2 mens versions that I have got already. We had measured her with a t-shirt on, definitely 34". Looked at the size guide - needs size 10. Mine were close fitting so I accepted this and sat back waiting to receive them. They took a while to arrive, a couple of days more than the jacket ordered a day later. When they arrived they were huge on her, so had to go back for an exchange for a size 8. Might be worth putting the measurement on your order and letting Alpkit choose the size.

This is the first time in 10 years of ordering that I have ever had to return anything.

What They Say: Kudos - Product Reviews from independent magazines and websites

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

TGO Magazine Reviews Kepler

the best value top tested


TGO June 2017 - Chris Townsend

Kepler Merino

this base layer is astonishingly good value. It’s great on, light enough to stash in your pack just in case an extra layer is in order and nice enough to hang out in at the end of your ride


Singletrack Magazine January 2016 - Beate Kubitz

Kudos for Kepler Base Layers

It wicks effectively, it's good on its own, with a wind or waterproof, or as the basis for layers on really cold days.


off-road.cc March 2018 - Jim Clarkson

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 Review Kepler

Glowing review of our Kepler from Women Climb

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.

Women Climb

Women Climb April 2016 - Women Climb

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

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