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Buffalo Systems Active Shirt - Slate

Buffalo Systems

Buffalo Systems Active Shirt - Slate


Weight: 780 g         10 reviews
The Buffalo Active Shirt is a unique fleece-lined garment, designed as an all-in-one base-layer and outer jacket. It's ideal for a multitude of outdoor uses, including hill walking, trekking, winter climbing, skiing and general outdoor activities. When compared to their Mountain Shirt, the Active Shirt benefits from a softer and quieter outer fabric, as well as a more muted colour.

Buffalo originated this one-layer system in the late 1970's, to replace the numerous layers often worn by climbers, fell runners and hill walkers in winter conditions. It comprises a lining of insulating pile fleece, with a functional and water-resistant shell outer, producing a garment that is completely windproof, lightweight and amazingly warm. It is also highly breathable and extremely efficient at transmitting moisture vapour.

As unconventional as it sounds, the Active Shirt is designed to work most efficiently when worn next to the skin. In this way, the pile fabric wicks moisture away from the skin more rapidly, where it is then dispersed to the outer fabric to evaporate and keep the body dry and free from chilling. Side zips have been fitted, not only allowing access, but to adjust for ventilation, enabling the user to regulate their body temperature on the move.

Buffalo Systems are dedicated to producing clothing for the professional and committed outdoor activist. All Buffalo products are rigorously tested through an entire season of Scottish winter and often longer. All components, from zips to thread, are of the highest quality and are equally tested.

Sizing: Buffalo have designed the Active Shirt to be a very close-fitting garment, to ensure maximum performance. Strictly speaking, the looser the fit, the less performance you will get. We recommend you measure your chest when completely expanded, and choose your size using this measurement. The Active Shirt is a mid-length top, which finishes at the top of the thigh.

  • Windproof and water-resistant PForm mini-ripstop outer shell
  • Aqua Therm pile lining
  • Highly breathable
  • 1/4 length zip with pile-lined baffle
  • Two-way side zips for access and ventilation, with storm baffles
  • Zipped map pocket with weather flap
  • Aqua Therm pile-lined hand-warmer pocket
  • Tape and buckle waist adjuster (inside hand warmer pocket)
  • Eight ventilation controls
  • Rucksack hip belt can be fastened through hand warmer pocket
  • Scooped back
  • Touch and Close strip around collar for attachment of hood
  • Touch and Close cuff adjusters
  • Elasticated rear hem adjuster
  • Colour: Slate
  • Windproof to 50 mph
  • Weight: 780 g (in size 42)
  • Machine washable
  • Made in Great Britain

Out of Stock in 4 sizes:

• 40 inch chest
• 42 inch chest
• 44 inch chest
• 46 inch chest

This item is out of stock in 4 sizes. To be notified by e-mail as soon as new stock is released in a particular size,  please sign up for a restocking notification below.


  Delivery in 1-2 days within the United Kingdom
  UK Orders placed before 2PM GMT will be dispatched the same working day
  Overseas delivery times will vary depending on the destination

Please note that our offices are closed at weekends, so any orders placed after 2PM GMT on a Friday will not be dispatched until the following Monday.

Orders with a total value over £300.00 will be dispatched free via a next day delivery service within the UK at no extra cost.

Please note that in some instances, orders for heavy items may take an extra day to arrive.

  Overseas deliveries
For overseas deliveries, please refer to the following estimated delivery times:

  • Europe: 3 - 5 working days
  • Rest of the world: 5 - 7 working days


A full refund or exchange will be given provided that the items have not been worn or used, and are returned to us within 30 days of purchase, together with all relative labels and packaging. You are responsible for the cost of returning items.

Please ensure that you include a copy of your invoice, along with an explanation of why you have returned your goods. If you wish to return your goods for any reason, please do so to the following address:

Woodlore Limited
PO Box 3
East Sussex
TN19 7ZE
United Kingdom

Product Reviews

Buffalo Systems Active Shirt - Slate is rated 5/5 based on 10 customer reviews.

All of our product reviews are from customers with verified purchases.

Overall Rating:


  1 of 10

  Wonderful jacket. Well worth the money. Very prompt delivery.  

  Sandra Kelly
8th March, 2021

Rated: 5/5

  2 of 10

  Buffalo pile and pertex (DP) clothing if worn next to the skin is the best cold wet weather gear you can buy. Better than Gore-tex, better than Paramo, better than ventile. I own all of these options in multiple variants. All of them top end garments. Buffalo DP is the only garment range which enables you to either be wet from rain or sweat and still warm and which dries whilst you are wearing it so fast that there is no chill factor and no risk of hypothermia. A DP Active shirt or Speed 6 shirt with Special 6 trousers or HE salopettes- next to the skin - will revolutionise how you judge all other garment performance. No changing out wet thermal layers due to perspiration. Carry a size larger DP shirt or jacket with an expedition hood for static stops in gnarly freezing conditions and this is all you need.  

  Peter Wilson
14th February, 2021

Rated: 5/5

  3 of 10

  What's not to love about this product - fantastic protection against the elements. It's become my new go-to jacket. The quality of the finish and the materials is high and it looks great too. The fact that it's made locally is icing on the cake.  

  Allan Freed
9th February, 2021

Rated: 5/5

  4 of 10

  Great service and fast delivery, an absolute pleasure to deal with, and by the way the jacket is great.  

  Glenn Hazlett
19th October, 2018

Rated: 5/5

  5 of 10

  Very warm with just a cotton t-shirt underneath. I'm 5 foot 7 inches with a 42 inch chest breathing in and ordered to size. The chest and arm length fit is great. Body length is long on me. It's well made and appears robust. Time will tell. I'll be wearing it for sea fishing and winter coastal walks. Nice to purchase something made in England.  

  Chris Dyer
18th October, 2018

Rated: 4/5

  6 of 10

  I really like this jacket, it is truly a great item. I have another very similar in style but the outer material is harder/stiffer than on this and it feels a little constrictive; not so on this one. The outer material is soft like a soft shell and the fit is very good. There are two zips under arm, one at the hem that can be taken up to facilitate removal and another at the armpit that can be taken down for ventilation. The zipped pockets join (kangaroo pouch) and there is a sinch cord inside to draw the item close to the body. The internal fleecey lining is not overly bulky and really performs well. I wear this with a long sleeve v.thin baselayer (arcteryx - v.good) and I find this more than enough even going out on early chilly mornings. I did try this with a further microfleece too but O felt a little uncomfortable and it's not necessary. I would suggest this item be worn stand alone whilst performing low to moderate activity - working around camp, short excursions and the like. For those thinking about layering, this acts as a base and midlayer in one. The softness of the outer layer permits a thin gore-tex style jacket to be worn over the top for additional protection (the ventilation zippers help). As stated, it is best to get a close fitting size. I don't tend to sinch the hem, I find it more comfortable this way, I do on my waterproof jacket. My only issue is with the wrist bindings - I find they shorten the arms and look a little odd when done up (obviously it is a simple and appreciated solution, however it is just my observation). All in all this item is very versatile and useful in most situations, equally at home in urban environments too.  

  Dan Lane
9th March, 2018

Rated: 5/5

  7 of 10

  My wife and I have just returned from 4 days in Iceland, where we wore the Buffalo System Active Shirts and Buffalo Systems Special 6 trousers, my wifes had to be bought from Cotswolds because you do not have coloured tops and she did not fancy the slate colour. We wore the tops and Special 6 trousers in all conditions including -3oC and wind speeds in excess of 50 mph, they performed excellently and will (infact did) recommend the trousers and tops to several people while we were in Iceland. As it says in the leaflets you need to wear only underwear underneath and nothing else and we were comfortable at all times. We went from outside walking in negative temperatures and high wind, to inside the car and the tops and trousers performed excellently. We were at no time too hot nor did we feel the cold or wind chill on anything except our faces. We would both not hesitate to recommend the Buffalo system to anybody that is involved in any hill walking type of outdoor activity.  

  Ralph Fielding
18th November, 2016

Rated: 5/5

  8 of 10

  The Buffalo Active Shirt is a well made and very comfortable item of kit. It's light weight so if you are out hiking and get too hot just stuff it in your day sack. If you wear it next to your skin you don't need a t-shirt. Good all season shirt.  

  Michael Ireland
15th August, 2016

Rated: 5/5

  9 of 10

  I have not yet fully tested this jacket, as I have yet to take it skiing in the Alps. However, I recently followed the advice of the manufacturer, Buffalo Systems, by wearing the garment next to the skin in near freezing temperatures. Despite other adverse weather conditions, including high humidity and a reasonably strong wind, I felt warm and comfortable; I could not feel the elements at all! I am impressed with the comfort (42 inch chest choice was perfect for a chest measurement of 41-42 inch) and happy that I have invested in something that will last years. It looks good too (says the girlfriend). Obviously a quality jacket that deserves the trust of an experienced wood-lore craftsman such as Ray Mears.  

  Adrian M B Ashby
24th March, 2015

Rated: 5/5

  10 of 10

  My New buffalo active shirt arrived today and what a pleasant surprise it was. This top has the rip-stop fabric, unlike my trusty old version (the Mountain Shirt). At first I thought it would be a bit noisy, but it is almost as soft as the old one. The best thing about this top is that the zip on the front pocket does not get caught up in the flap that covers it, as it did on the old one. This was the only annoying thing about the previous top, so it is nice to see that the rip-stop material being a little bit thicker has stopped this from happening. Apart from that the top is still as good as it always was and will keep you warm as toast as long as you follow the garment guidlines. This time I purchased the Slate colour, mainly because my daughter was fed up with seeing me in green, but I'm very pleased I did as it looks great. So get your wallet out it will be the best £115.00 you will ever spend.  

  T J Le-cheminant
11th November, 2012

Rated: 5/5

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