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Koulin Trail Tee [Mens] baselayer t-shirt

Lightweight technical base layer t-shirt with Polygiene ™ technology, for activities where breathability and moisture wicking is key

Koulin Trail Tee [Mens] in Forest Green
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  • Forest - Koulin Trail Tee [Mens] in Forest Green
  • Nemo - Koulin Trail Tee [Mens] in Nemo Blue
  • Fontainebleau - Koulin Trail Tee [Mens] in Font Blue
1. Colour / Size
Fitting guide

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Lightweight, high-wicking, breathable, and with anti-smell Polygiene ™ technology? What doesn't the Koulin Trail Tee have?

A durable, breathable, wicking, quick-drying base layer and with Polygiene ™ technology; the Koulin Trail Tee is suited to activities where your work rate is high and your skin glistens with little beads of sweat!

Body mapped mesh panels are designed to maximise breathability and flatlock seams ensure comfort, particularly when worn under other garments or with a rucksack.

A handy pocket zipped pocket on the back of the tee sized to keep your credit card or key safe without letting it bounce around and cause discomfort.

Reflective logos help keep you safe if you are still out when the sun goes down. Now you have no excuse not to ditch your cotton t-shirt when you head out into the hills!

What is Polygiene?

Polygiene anti-odour treatmentWear more, wash less: it’s every busy adventurer’s dream…
We apply Polygiene™ to garments so that they smell less with wear and need washing less between use: ideal for that multi day getaway (and you’re doing your bit for the environment too).
Polygiene ™ is a silver based treatment that we apply during fabric production. The silver chloride prevents the growth of the bacteria that makes your clothes pong without interfering with the skin’s natural bacteria flora, so it’s comfortable and safe next to your skin. Polygiene ™ is bluesign ® approved (meeting the highest environmental standards) and lasts as long as your clothes do, so you’ll never need to reproof them.
The catch? There isn’t one! You can wear this garment day in, day out, and day back in again without causing a stink – winner!

Key features
  • 3 Year Alpine Bond
  • Polygiene ™ odour eliminating technology
  • Body-mapped mesh panels maximise breathability
  • Flatlocked seams for comfort
  • Moisture-wicking and durable
  • Reflective logo
  • Discrete rear card/ key pocket
More images
  • Mens-ss-forest-1 - Mesh on the back of the Koulin tee gives ventilation when you're working hard. Pete wears the Forest tee in Medium
  • Mens-ss-nemo-1 - Pete sporting the Nemo tee in Medium
  • Mens-ss-font-1 - Pete wearing the Fontainebleau tee in Medium
  • Mens-ss-nemo-2 -
  • Mens-ss-forest-2 - A small pocket is handy for carrying your keys, a credit card or energy gel
  • Mens-ss-forest-3 -
  • Mens-ss-forest-4 -
  • Koulin-trail-tee-m - Pete managed to sneak away for a run in the Koulin Trail Tee and Trail Tights
  • Koulins - Koulin Trail Tee and Trail Tights
  • Koulins2 -
  • Trailtee mens1 - Trail Tee in on the Torridon trails
Vital stats

Fabric: 100% polyester 150 gsm
Panel fabric: 100% polyester mesh 110 gsm
Polygiene ™ Technology


Weight: S: 130 g; M: 140 g; L: 145 g; XL 150 g; XXL: 165 g

Origin: China

Size chart
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.


Layering system

Layering up is the best way to be flexible and take more control over the conditions.


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The base of all layering

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



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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.


14 Reviews


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Koulin T Shirt

Just received this today and I'm very impressed with the quality and fit of it and as a bonus it's at a very good price as well. I shall be wearing mine on the hills with Longtown Mountain Rescue Team of which I'm a member of.
Cheers Alpkit!

Excellent base layer.

Just back from a two week hut tour in the Dolomites and this was one of three base layers I carried. It performed better than the other two and cost much less. Will be buying another one soon.

Fantastic at this price

I've been using these for both running and hiking having previously used Paramo baselayers. These are far cheaper, much better fitting, look good and don't have the problem of static. In terms of warmth and wicking performance I haven't noticed any difference.

From now I'll be using alpkit for my baselayers.

Dave Arnett
Really pleased

Bought two of these. They are everything you could want from a baselayer with the addition of a great cut. The key pocket is an added bonus.


Excellent product- so good in fact that within 2 minutes of unpacking my parcel (speedy delivery) I was straight back on the website to order another. Nice cut, quality feel.


Bought 2 of these for a recent skiing trip to Norway. Incredibly comfortable to wear. Looking forward to using them for walking and biking too.

Wondering Wurzel

On a hot day's walk this top has great wicking ability, doesn't show the damp patches, and at the end of the day didn't smell too bad either!

Perfect fit as well.

Wore this with the Timbuktroos trouser, and the combination worked very well.

I'll be buying more of these, such a great price.

Eddie Alder
Winning Top!

I was the lucky winner of one of these tops in the white peak trail run. Worn for two events now in hot weather. Great wicking properties, dries rapidly. Perfect fit, awesome quality. Will definitely invest in a few more of these, and be trying more Alpkit products.

Michael Lancaster
Great value Excellent performance

I bought a Koulin for a 3 day cycle camping trip across the Lakes. I was pleasantly surprised to be able to wear this t shirt the whole time. It stayed comfortable and sociable despite getting soaked during some significant hill climbing with a big pannier load.

Good performance and features.

Excellent moisture control and comfortable while running. Fit is slightly loose, consider a size down if you want a closer fit. Body length is also short compared to other brands I've used although in fairness I am 6'4". Nice top, excellent price.

Neck design not to my taste

Neck too low in my opinion, which means neck protection needs to be worn more often, say in cold of very sunny conditions. I note that this criticism has been made of other Alpkit tee shirt designs. Other than that good 'Alpkit' value.

Too short

I bought a small as I'm a thin gentleman but at 6 foot, I find it a little short compared to other brands that I own. Whether larger sizes are longer, I don't know, but that doesn't help me. Performance wise it is great and a good price in the sale. For me all the Koulin range needs lengthening.

Sizing is too large

Bought a small, it's too large. Doesn't sit close enough so it hangs too low, is too baggy and flapps around when I'm active. I'm not tiny, but I'm quite skinny. Small t-shirts of most brands fit me perfectly, but this is too large. It's a shame as the fabric and cut seem good, and the seams are flat and very comfortable.

Hit and miss

Over all a solid technical base for a good price but I'm not so sure about the anti smell technology, I wore it out for 2 short runs and it was pretty pongy afterwards. Certainly not comparable to merino's smell reducing qualities.
The only other issue is that little pocket that's so handy for "keeping your keys, card or compass in":
I returned to my car after a pleasant forest run to discover my keys vanished.



UKC Review Koulin

Alpkit have done it again. For a very good price you have kit that can withstand a right beating


UK Climbing December 2016 - Bridget Glaister

Best Budget Buy - 8.5/10
At mag koulin trail tee resized-2

Adventure Travel Magazine Reviews Koulin Trail Tee

An affordable base layer that more than keeps up with the rest of the competition

Adventure Travel Magazine

Adventure Travel Magazine July 2017 - Adventure Travel Magazine