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Woolpower Ullfrotte Original Long Johns with Fly - 400g - Green


Woolpower Ullfrotte Original Long Johns with Fly - 400g - Green


Brand: Woolpower
Weight: 460 g         13 reviews
The Woolpower Ullfrotte Original Long Johns with Fly - 400g comes from a collection of garments that provide the best results when worn next to the skin. In very cold conditions it can be worn over the top of the Woolpower - 200g range. These 400g Leggings are the perfect partner to the Woolpower - 400g Sweater.

Each garment features a terry-knit soft inner in fine merino wool, reinforced with polyamide for better wear-resistance, making it comfortable yet durable. Each garment part is knitted conically to reduce the need for seams, providing a great, comfortable fit.

Woolpower - 400g clothing has a unique warming ability because of its construction and material: moisture is wicked away from the skin keeping you dry, while the wool is capable of retaining body heat even when damp.

Woodlore have been proudly stocking Woolpower's woollen garments since 2003, and have no plans of stopping. Their range of base- and mid-layer thermal tops and leggings come highly recommended by both Ray and the entire Woodlore Team. They have become a staple item of our overseas winter expedition kit lists, and are equally important for use back here in the UK.

Buying for warmer climates? Please take a look at our Woolpower - 200g range.

  • Colour: Pine Green/Green (shade may vary)

    Please note that sizes shown in the drop-down menu are per waist measurement. Sizing in reference to body height of wearer is shown below:
    • S = 170-176cm
    • M = 176-182cm
    • L = 176-182cm
    • XL = 182-188cm
    • XXL = 182-188cm

  • Out of Stock in 2 sizes:

    • Medium (32 to 40 inch waist)
    • Large (36 to 44 inch waist)

    This item is out of stock in 2 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

    Woolpower Ullfrotte Original Long Johns with Fly - 400g - Green is rated 5/5 based on 13 customer reviews.

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

    Overall Rating:


      1 of 13

      Very pleased so far. Worn for a couple of days birdwatching and some walking, with lots of standing and sitting around in temperatures around freezing. I'm around a 34 inch waist, 5ft 8, perfect fit.  

      Steven Kirk
    18th January, 2023

    Rated: 5/5

      2 of 13

      Bought the large as a present for my partner and he said they’re excellent quality and fit perfectly. He’s 6ft and the leg length is spot on. He would definitely recommend these long johns.  

      Helen Harmes
    5th January, 2023

    Rated: 5/5

      3 of 13

      Really warm long John's These are well worth the investment. I might get another pair of woolpower garments for layering in winter when I'm not active. They are expensive but I've used other brands and been cold and miserable so the price is worth it for me.  

      Mike B
    17th October, 2022

    Rated: 5/5

      4 of 13

      Absolutely fantastic base layer! I used both the 200g and the 400g Long Johns from Woolpower on a recent expedition to the Arctic and they were both absolutely first class. I found that the 200g kept me warm enough to be comfortable, but also allowed me to run cold enough to not sweat excessively, a valuable dual benefit in such low temperatures. The 400g will stand up to anything with a decent set of trousers. I found that in an environment without clothes washing facilities it is perfect for me, due to the ease of airing out. I took x1 400g pair of Long Johns with me and they came into their own when the Mercury dropped to almost -40. I also had no problems with maintaining good personal hygiene. It would have been an entirely different story with synthetic base layers. I am thrilled with this product and will be hard pressed to find anything I prefer any time soon. The sizing guide/fit is accurate and allows for air to be trapped close to the body without being too baggy and cumbersome. The Long Johns were paired up to great effect with the Thorlos extreme cold socks and I had no issues with tight spots or restriction when the socks were work over the top of the Long Johns. Zero itchiness - 100% comfort. Top drawer!  

      Jonathan Peter Sowden
    26th March, 2022

    Rated: 5/5

      5 of 13

      Bought for heat retention while out in the British winter, worn next to skin with waterproof leggings over the top they, are warm and comfortable. I used to buy cheaper thermals thinking they were all the same, they are not, I won't make that mistake again. These Merino wool products are expensive and I wondered whether the Woolpower garments would be worth the outlay, all I was looking for was to stay warm and dry on cold days, they do it very well. I'm very pleased with all the clothing I've purchased from Ray Mears Bushcraft. They are worth the money but I must be honest and report that I have two places in the crutch of my long johns where the fabric is beginning to separate after only three weeks of wearing. Nobody sees them, their underwear, but disappointing all the same.  

      David Kewley
    24th October, 2020

    Rated: 4/5

      6 of 13

      Very happy. Good fit. Good price  

      Gary Oreilly
    21st March, 2018

    Rated: 5/5

      7 of 13

      As someone who is intolerant of wool, I can't wear these garments next to my skin. However, they are just fine and work superbly over my existing base layers . For this reason I would recommend these as a mid layer (rather than the 200g Ullfrotte base layers) for anyone who is sensitive to wool. Wonderfully warm but thin enough to layer under another mid layer or to enhance the insulation of a sleeping bag. A great addition to my kit, which takes up very little space. Thank you Woodlore for making these available in the UK.  

      Simon Miles
    5th October, 2017

    Rated: 5/5

      8 of 13

      I do a lot of birding and photography so there is a lot of standing around in the cold. These are a denser weave than the 200g (which are excellent in themselves). I have medium 200g which are a great fit so I went for medium in the 400g and found them a bit tighter around the quads. However, despite the tight fit they are exceptionally warm as under trousers and the tightness has not restricted movement to date. They are noticeably warmer than the 200g so are best used in very cold conditions. Excellent construction and a quality feel to them as expected. Recommended highly.  

      David Grant
    2nd January, 2017

    Rated: 5/5

      9 of 13

      Warm and cosy.  

      Simon Michell
    18th February, 2016

    Rated: 5/5

      10 of 13

      Excellent service and excellent product. Thanks for your help  

      Elena Koroleva
    13th March, 2015

    Rated: 5/5

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