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Buffalo Systems Active Shirt - Slate

Buffalo Systems

Buffalo Systems Active Shirt - Slate


Weight: 780 g         16 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 one size:

•  38 inch chest

This item is out of stock in one size. 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 16 customer reviews.

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

Overall Rating:


  1 of 16

  Love this. Warm, well fitting, practical. Can be adjusted for a snugger fit around the middle. Good colour. Thanks to side zips can be opened out to vent and ease putting it on and off. Needless to say, delivered fast and without a hitch.  

  Paul Cobham
7th March, 2024

Rated: 5/5

  2 of 16

  Very pleased with this. I've worn it for one three day hike in Scotland through Galloway in August. It's well designed and well made. It's suggested that it's worn straight on the skin so I tried this and I would concur. fleecy inside so very soft and I found it was surprisingly breathable. walking with a decent pack in 17 degrees I was still fine, occasionally opening the side zips for some extra air. Come the evening I was still just wearing it alone and was very snug. We had a day of rain and it's waterproof and kept me dry all day. I did put a sort of wicking base layer under it one day and found that worked quite well too. Another lovely piece of kit. I expect to have this and be wearing this the rest of my camping/trekking days (i'm 48).  

  Richard Doughty
17th August, 2023

Rated: 5/5

  3 of 16

  I’ve worn Buffalo since the mid-90’s, mainly the mountain shirt and belay jacket when I was doing serious winter mountaineering and rescue team duties. The Active shirt is similarly warm to the MS (best for sub-zero active pursuits or above freezing for less active pursuits). The cut of the active shirt is a bit longer than the mountain shirt (half way to special 6?) and a bit more generously cut, which suits my figure now. Best bought to fit snugly and from experience it’s best worn next to the skin for active pursuits. It’s the perfect garment to fit and forget in wind, rain, cold, anything but warm weather. The new shell fabric is a ripstop one, made in Belgium I believe rather than made in Perseverance Mills - shame its no longer all ‘made in England’ and whilst the fabric is a bit quieter than the pertex it replaces I’m not convinced it’s a big improvement for hillwalking, but the quietness may be a benefit in bushcrafting, though keep it away from naked flames as like all Buffalo gear I don’t think it would do well if it caught a spark or worse.  

  Paul Stead
30th October, 2022

Rated: 5/5

  4 of 16

  As first time Buffalo users we were apprehensive about the system. We have just spent 3 weeks in the far north of Scotland and have, so far, been impressed with the performance of the shirts. The greatest advantage, the one that persuaded us to purchase, is that it is one garment for all purposes and it works. I did buy an Active Light shirt too and have found that useful in warmer conditions. My wife is happy with the Active Shirt but is generally colder than me. We would both like the sleeves to be longer and I would like the hand warmer pocket to be zipped at the top as well as the bottom. Good to find a garment that works after years of cursing not waterproof 'waterproofs' and struggling to put them on in the rain.  

14th May, 2022

Rated: 5/5

  5 of 16

  Excellent piece of kit, well made and great value.  

  Steven Knight
1st April, 2022

Rated: 5/5

  6 of 16

  Absolutely fabulous product, so good I recommended it to a work colleague who bought one and is really pleased with it. Does exactly what it says on the label. Brilliant buy.  

  Em Mcginness
11th January, 2022

Rated: 5/5

  7 of 16

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

  Sandra Kelly
8th March, 2021

Rated: 5/5

  8 of 16

  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

  9 of 16

  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

  10 of 16

  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

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