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Buffalo Systems Mountain Shirt - Olive Green

Buffalo Systems

Buffalo Systems Mountain Shirt - Olive Green


Weight: 670 g         17 reviews
The Buffalo Mountain Shirt is a unique fleece-lined garment, designed as an all-in-one base-layer and outer jacket. It's perfect for various cold-weather activites, such as hill-walking, fishing, climbing, and trekking, as well as for general outdoor use.

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 Mountain 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 by the Pertex to the external surface 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 Mountain 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 Mountain Shirt is a mid-length top, which finishes at the top of the thigh.

  • Windproof and water-resistant Classic Pertex outer shell
  • Windproof to 50 mph
  • Aqua Therm pile lining
  • Highly breathable
  • Neck zip with storm baffles
  • 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 (10cm longer than front)
  • Touch and Close strip around collar for attachment of hood
  • Touch and Close cuff and hem adjusters
  • Colour: Olive Green
  • Weight: 670g (in size 40)
  • Machine washable
  • Made in Great Britain

Out of Stock in 5 sizes:

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

This item is out of stock in 5 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 Mountain Shirt - Olive Green is rated 5/5 based on 17 customer reviews.

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

Overall Rating:


  1 of 17

  Excellent coat, incredibly warm. Great price too.  

  S Cloy
29th November, 2020

Rated: 5/5

  2 of 17

  This mountain shirt is an amazing piece of kit and worth every penny! I haven’t really taken it off since purchasing and made me realise I have never really had a good jacket until now! Thank you.  

  Greg Syrett
3rd November, 2020

Rated: 5/5

  3 of 17

  Buffalo Systems Mountain Shirt, Great piece of kit, keeps you very warm and cosy very good fit and well made, had one many years ago for mountaineering and climbing. Now in my later years use it on cold days for my outdoor sports photography trips.  

  Colin Darkes
18th October, 2020

Rated: 5/5

  4 of 17

  Absolutely delighted. It has proved to be everything it said it would be. It kept out the wind, kept me dry in a couple of major downpours and was really comfortable to wear - I just need to try it out in snow. And it was great to be able to buy British  

18th August, 2020

Rated: 5/5

  5 of 17

  A superb piece of kit - I wish that I had discovered Buffalo clothing a long time ago! The shirt is warm, windproof & waterproof. So far, all that I have ever needed under it is a wicking t-shirt. I may need a little bit more in the winter, but it won't be very much. Highly recommended. I was also impressed by the company - not only did they have the cheapest prices that I could find on-line, they also offer free postage, & same day dispatch.  

  Bernie Stafford
21st July, 2020

Rated: 5/5

  6 of 17

  The Buffalo Mountain Shirt is a great item and is as good today as the original Special 6 Shirt from my army days way back. Great for warmth when wet or dry and superb on the tops in strong winds. Truly a great all-rounder. Unzip the sides when moving for venting out heat and baton down the hatches to get warmed up. The hood is a great addition in extreme weather as it keeps out the worst of the weather. I also love the large map pocket. Great kit. Glad I chose to reinvest in this icon once again. 5*****  

  Terry Marlor-gage
10th January, 2020

Rated: 5/5

  7 of 17

  Purchased for a Christmas present. Ordering was easy, the parcel came well packed and arrived very promptly. My son is really happy with the item which fits well and is of extremely good quality, worth the price. Happy with purchase and would use again.  

  Tracey Middleton
6th January, 2020

Rated: 5/5

  8 of 17

  Excellent, very fast delivery to here in Cyprus. Great tunic that fits perfectly.  

  Tracey Ann Crotch
27th December, 2019

Rated: 5/5

  9 of 17

  I haven't had a chance to try it out in cold weather but I have tried lightweight backpacking on a cold, wet & windy August weekend with just the mountain shirt and a nylon running shirt for top half wear. When the rain got heavy the mountain shirt (without the running shirt) kept me comfortable and with maximum ventilation not too too sweaty. If I hadn't have been wearing a rucksack (about 5kg) airflow would have been better still. The inner fleece dried quickly, even when a little damp was still comfortable. Worn with the hood at night in my bivvi, it kept me toasty worn. Love it!  

21st August, 2017

Rated: 5/5

  10 of 17

  Perfect for February salmon fishing in Scotland (in the snow). I wore a base layer underneath and needed only a hat and gloves to be comfortable. Outstanding piece of kit.  

  Patrick Clarke
17th February, 2017

Rated: 5/5

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