Woodlore — School of Wilderness Bushcraft  

Buffalo Systems Mountain Shirt - Olive Green

Buffalo Systems

Buffalo Systems Mountain Shirt - Olive Green


Weight: 670 g         26 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 26 customer reviews.

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

Overall Rating:


  1 of 26

  A stalwart classic, bombproof and reliable product. If only it packed down smaller it would be perfect. I went for the 48 inch chest, which is quite big, I generally tend to size up with outdoor kit, I could have got away with the 46, so my advice would be order true to size, as its long in the body and arms. Its also noted that this is on sale for significantly more money on other sites. Very happy with the cost, the service and the delivery times. Thank you RayMears.com  

  Matthew King
12th May, 2021

Rated: 5/5

  2 of 26

  Top quality piece of kit. I've been looking at this for a while and finally took the plunge and haven't regretted it. Haven't worn it next to my skin yet but great as a final layer. Best price found on this site and I am a big fan of Ray so a it is a result all round. It is expensive but worth the money in my opinion and will last for years I'm sure.  

  Sam Richards
5th May, 2021

Rated: 5/5

  3 of 26

  Really lovely quality and incredibly warm, the lined pockets are fantastic for winter days.  

29th April, 2021

Rated: 5/5

  4 of 26

  Excellent customer care. Thank you for your immediate attention to my online order that I received the very next day. Quality product at a great price.  

  Jane Schofield
6th April, 2021

Rated: 5/5

  5 of 26

  Buffalo systems mountain shirt is superb. I wear mine against my skin but sometimes with a thermal base layer depending on the temperature and what I am doing but it keeps me warm and dry. The ventilation zips are great to cool off a little if needed. Like all of the kit I have bought from Ray’s Woodlore site it’s top notch and by being on the site has already passed the sniff test. The order arrived the very next day too so excellent customer service.  

  William Allen
14th February, 2021

Rated: 5/5

  6 of 26

  If been thinking of getting one of these for 30 of years and have finally got one. Worth the wait, I think. Because of lockdown I've only really been able to use it locally on lowland country walks so far, but it has easily stood up to rain, sleet and snow in some quite stiff breezes at around zero. Haven't felt cold except once on a stop. Occasionally noticed that the wind can whistle up from underneath and that maybe the side zips could do with better baffling, but not enough to be a problem. I've even been a little too warm at times, even in sub zero temperatures. All in all I'm really very impressed. I've now ordered some Teclite salopettes which I think will work very well with the shirt.  

12th February, 2021

Rated: 4/5

  7 of 26

  Not worn a great deal yet. Interesting to compare it to the much drier but colder New England winters, as to say a UK winter. I've been wearing a thermal long sleeve shirt underneath as the fur is somewhat itchy. Really like the pockets, shame the hood isn't included. Everything from woodlore was great and delivery to the US was very quick and reasonable. Would definitely use again and get more Buffalo Systems clothing .  

  Gareth Fell
2nd February, 2021

Rated: 4/5

  8 of 26

  Excellent garment, bought to replace a previous 'Mountain Shirt' that was almost 20 years old, mainly used on Dartmoor with all its changing weather patterns. Always remained warm and comfortable. Planning to give this a go when skiing in the Alps when we are able.  

  Duncan Lamb
2nd February, 2021

Rated: 5/5

  9 of 26

  As expected the buffalo mountain shirt is brilliant. Warm, dry and snug. My son wears it for work mainly and he's outdoors all day as a tree surgeon. He has worn buffalo before and always swears by them.  

  Charlotte Berlyn
1st February, 2021

Rated: 5/5

  10 of 26

  Excellent coat, incredibly warm. Great price too.  

  S Cloy
29th November, 2020

Rated: 5/5

  Share your opinion!

Let other people know your thoughts on this product.

© 2022 Woodlore Ltd · Terms & Conditions · Privacy & Cookie policy · All Rights Reserved.