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Fishnet Long Underwear


 Product Description

The most important layer of clothing you wear in a cold climate is your first layer, your underwear. Fishnet long underwear made from nylon is the absolute best first layer. Wiggy fishnets are made from nylon yarn, knitted in a pattern that is a 3/8" mesh hole, 1/16" thick. The human body emits moisture through its pores continuously. If this moisture is stifled from getting away from the skin surface, the body loses heat to the moisture very quickly. When covering the body with fishnets, the moist vapor leaving the body is not inhibited in its movement from the body by the fabric. Cotton, wool, and silk underwear absorb the moisture, which in turn doubles the number of elements that will absorb your heat. If your wear a synthetic underwear that is traditionally knitted, regardless of the yarn, polyester or polypropylene, it stifles movement of the moisture. Hence, the moisture stays on the skin surface, which absorbs your heat.

Fishnets have additional qualities. Since the mesh has a very limited surface area, conductive heat loss is minimal. When you wear underwear that touches most of your body, it conducts heat from your skin surface. The feeling you have when wearing fishnets is that of a layer of warm air around your body. If the layers over the loose fitting fishnets are also loose fitting, as they should be, movements will cause a bellows effect. If you have an open neckline, the moisture-laden air will move freely out of the neck opening and not be forced through your clothing. Vapor will take the course of least resistance as liquid does.

As to the origin of fishnet or string garments (underwear), there are stories that fisherman would cover themselves with their nets, and also make garments from the nets.we do know that as early as the time around the First World War a Norwegian Army officer encouraged his men to wear string vests for marching and skiing. These were sleeveless undershirts, crocheted from a string like yarn. From these garments we developed the modern fishnet garments.

The fishnet garments are the most satisfactory articles of clothing. They satisfy all requirements for correct physiological clothing, both when the body is active and inactive, and for various climates and temperatures. They provide a static layer of air around the body. This causes the insulation and makes it possible for perspiration to evaporate.

The human skin becomes damp when the body is warm, and it must then lose its surplus heat. The function of perspiration is to draw heat from the skin and thereby cool the body. In order that perspiration shall function properly it must evaporate and not be absorbed by the clothes. If this evaporation process is hindered, the body will react with increased perspiration, which causes unnecessary stress on the human body.

When wearing fishnet underwear as a first layer to keep warm when it feels cold, button up and close openings in outer garments. The result is highly efficient insulation, mechanically much like wearing Lamilite outerwear. When the body is active and becomes warm and cooling off is needed, unbutton and open openings in the outer garment, allowing hot air to escape and it the moisture you have generated will escape as well, thereby allowing body to cool down. In mild or warm weather, wear under a lose fitting shirt or alone, and it will allow the body to ventilate properly.

Our well being increases when the body surface is open to the air. There should be little contact between clothing and skin, and in this connection the fishnet garments have great advantages. The fishnets are a barrier between the skin surface and the clothing, the mesh openings in the fishnet prevents contact between clothing and skin.

Top: $42.50
Bottom: $55.00
Full Set: $97.50

Sizing Note: Please note that Wiggy's fishnet fabric is not stretchy, like most long johns on the market these days. That means you may want to consider ordering a slightly larger size fishnet garment than you typically would for other long john's, especially for the top. So if you normally wear a large, you may feel more comfortable in an XL fishnet top instead. Please call if you have any questions and we can help determine the best size for you!

Plus Sizes Available: Call for pricing

 Product Videos

Why You Need Fishnet Long Johns
  • Why You Need Fishnet Long Johns

Please Note: Sleeping bags are sold via the outer shell color. The color of the interior lining is subject to change and may not match current photos on our site. If the interior color is important to you, please call us at +1 (866) 411-6465 to place your order.

Product Testimonials

  1. undecided

    I’ve bought a top and bottom due to the reviews on here. I find them very uncomfortable to wear. The top needs to be longer. The bottoms need to be longer as well. The elastics around the cuffs and ankles are extremely tight on me. 5:10” 215#. I don’t think I was dryer or warmer in them. Maybe I just need to try them more times but I just didn’t like how they felt. Also don’t let the guys at camp see you in them. Endless harassment lol. Overall I’m a big fan of Wiggys products


    Surprisingly soft and comfortable. After a year of use they’ve proven to be strong and durable.
    They don’t retain body odor like conventional thermal underwear. They wash easily and dry very quickly.
    And they’re not just for cold weather. They work well over a wide temperature range, keeping your skin dry, not clammy.
    Much more effective than other options. Wiggy’s Fishnet Underwear is in a class by itself.

  3. Great Product in a variety of conditions

    Thankyou Jerry,

    This is without a doubt the best base layer I have ever used, better than silk, wool blends, or synthetics. It does what it advertises. Just as Jerry explains it lets the moister vent from your body, but it does not stay on your surface as other materials do. So that you can stay warm when you are sweating in cold and freezing temperatures.
    Also equally important is to have a base layer that you can wear in changing conditions. What happens when you start in the 20's and end in the 50's or 60's . This can often be a problem as you want to be warm in the cold but as the day warms up, you have to shed layers and if your base layer is the one that is making you the warmest you obviously have to strip down to take that off. The fishnet lets you wear it all day long without having to change. Since my purchased I have used it to work outside in these exact conditions. As the day got warmer I did not get overheated because I had too many layers. Another great thing about the fishnet longjohns is you can cool down really quickly as well. If you are working up a good sweat open up your shirt or lift the outer layer off for a minute or two and you have cooled down. This is definitely my go-to undergarment if I have to do anything outside. Anyone who hunts, fishes or works outside needs to have some of these. I can't believe I have gone all these years without knowing about this, so once again Thanks Jerry.

  4. Not merely survival, but comfort!

    This morning I spent about an hour walking outside here in Northern New Mexico. As the sun rose the temperature hovered around 0°F. I was totally comfortable. My gear was 100% Wiggy's but for skivvies and an old pair of Key Logger's jeans. But the package was very light! It consisted of mesh underwear (upper and lower), mesh base layer top, Lamilite socks and lined chukka boots, a jacket liner, a Ducksback balaclava, and a "boomerang" handwarmer. That's it! Yes, it was still air and dry, but I've never felt so warm at that temp with so little gear. Perfect.
    Wiggy's begins with the unalterable fact that the human body is a "water engine." Any technology or philosophy of outdoor gear which ignores this fact or works against it is doomed to failure. It's my regret that I didn't hook up with Wiggy's until I was near 70 years old but I have now and I'm not looking back. I've been going into the outdoors my whole life. I've done it for enjoyment but often it's been reduced to just surviving. That includes military experience under arctic conditions with sleeping bags constructed of cotton canvas and lumpy, wet duck's down. Now when I go out I'm dry and warm and don't look like the Michelin Man in camos. I come back having had a good time and ready for more. Some of the less costly Wiggy's items are real "home runs" like the mesh underwear, Lamilite socks and jacket liners. Try them! You'll wear the stuff everywhere and enjoy it. Wiggy is a bit cantankerous at times, but sometimes the truth has to be aggressive. This is especially true when most of the outdoor industry is filled with robbers, rapists and fashionistas who've never sleep a night on the ground.
    I encourage anyone to try a few of the smaller items. Test them out. I think you'll find yourself coming back for the best sleeping bag you will ever own. I have several and they are warm, tough and much laundered but look new. Then you can bear witness yourself. When your friends ask, you can tell them. "Buy Wiggy's; it works!"

  5. An incredibly Important Layering Piece

    I ordered this pair of fishnet underwear, after having a rather disappointing experience with a wool fishnet shirt from Bryjne of Norway. This biggest issue that I had was how weak the links of fabric between the holes were. Putting the shirt on and off would occasionally make rips and holes, eventually rendering the shirt a bit of a ragged mess. I had my reservations concerning this pair because of it's 100 % Nylon construction, which I thought would be dreadfully uncomfortable. It took a bit of getting used to,but the fishnets have proven to be comfortable and very reliable.

    All of the importance of a fishnet base layer is very true, if you are going to be sweating in a freezing climate. I was able to put these fishnets through some rigorous testing in a recent trip to Canada. I wore the fishnets just about every day, and the days I hadn't I quickly recognized the phenomenal difference it made in keeping me warm. In terms of staying warm, these fishnets were more important than my insulating layers, which while adequate did less to keep me warm than the fishnets did. I've washed and dried them without issue, but be mindful of how long you dry them because the elastic waistband on the fishnet pants did shrink slightly after being left in too long. During my treks, I wore the fishnets first under a wool shirt, wool hoodie and Poly-Cotton smock. This combination kept me warm in temperatures ranging from -5 to 10 degrees celsius.

    Overall, these fishnets have proven to be invaluable in the cold, and I treasured them every day I used them. Thank you Jerry for a great product, and for taking the time to teach me about the importance of this layer.

  6. Better than advertised

    Just received my fishnet top and wore it with a cotton shirt on a 34 degree day cutting wood. That combo was so warm I had to open my shirt. This shirt will keep a dead man warm! No sweat... just warmth. I highly recommend this product for motorcycle riding, wood cutting, hiking, ice fishing, even in the cabin when the fire has gone out.
    The only negative I have with the shirt is I am 220 pounds, 5 feet 8 inches tall and the XL is a bit snug. I can get it on and off but it is a bit tight.I plan to buy another in a 2 XL.
    If you want to stay warm with little or no sweat this shirt is for you.

  7. Amazing!

    Great base layer, Jerry! Thank you. This will come as no surprise to you but I received my top today and it's 10˚F with a 10-20mph wind. I washed the top, put it on wet along with a heavy and dripping wet flannel shirt (almost a light jacket weight, put my ventile jacket over, and headed out for a 10 mile bike ride up the pass (we live on Pikes Peak). about 70 minutes out in the cold, with 50+ mph headwinds as I rode home down the pass (including my speed). I started out slightly chill but never got colder. When I got home the end of the flannel shirt sleeve was frozen solid, but I was still just fine.

    I have no intention of ending up in those conditions normally, but it is fantastic to know that this system allows for a LOT of the unexpected to happen without dire consequences. Thank you!

  8. Quetico canoe trip

    I wore the top 24/7 for 8 of 10 days while in Quetico. Took me a day to get used to the texture, then I never knew I had it on. No body stink at the end of the trip. I ordered a large. I am 6'4" and still had to fold the cuffs up. For my canoeing/fishing/camping usage, I would like to see a T-shirt styled option.

  9. Great Product Line!

    Hello Jerry,

    Thank you very much.

    I am always impressed by how quickly you respond to a customer's inquiry.

    As I said in the past, you have a great product line. Your fishnet underwear, for example, works better than any so-called "thermal" underwear that I have ever worn. Wearing the latter, I always remain perfectly dry. It's amazing how a garment consisting mostly of holes can create warmth that would otherwise not exist.

    As for your 'Sweater', when combined with the fishnet, it's perfect down to twenty five degrees, even if I am stationary.

    At 20 degrees I can drape your Super Light over me like a blanket and feel warm. (No need to zip the bag up.)

    Yes, the bags are heavier than similarly temperature rated sleeping bags**, but they are warmer. In any case, if a person is worried about an extra two pounds of gear, for example, just lose two pounds of body fat.

    Most persons are overweight and out of shape. That being the case, just condition yourself and lose some weight. Stop worrying about an extra two pounds of gear. Marines, for example, carry well over 60 pounds on long hikes, moving at a rapid pace. (They can do that because they are not fat and out of shape.)

    Regrettably, muscularly weak backpackers, obsessed with covering long distances daily, have led to a host of light, but dysfunctional out door products.

    Well, that's my opinion.

    **NOTE FROM WIGGY: Similar bags that are noted for the same temperature as mine that are lighter in weight do not work at those temperatures; those numbers are fictitious.

  10. Thanks for good products.

    Visited with Mark in Anchorage few weeks ago and got fishnet top and Lamilite socks. I have been using them for bike riding in low 20 to 30 degree days so far. Can really tell a difference. I am a heavy sweater and my top is not soaked to the skin on my rides. Therefore I am warmer. Look forward to using the socks in fishing waders next summer.

    Been wearing my older black Welco boots in 20 degrees, work great.

    Thanks for good products.

    (Editors comment: the old Welco boots were Lamilite insulated.)

Our Locations  +  Contact

Corporate Office & Factory

To place an order, please contact our corporate office & factory at:

Wiggy’s Inc.
PO Box 2124
Grand Junction, CO 81502

Store Location

2482 Industrial Blvd  •  Grand Junction, CO
(970) 241-6465

+1 (866) 411-6465 f:  (970) 241•5921 e:  

When it comes to extreme cold weather gear, Wiggy's has you covered.

Check out all our products from sleeping bags & shelters to footwear & clothing. Our uniquely developed continuous filament fiber called Lamilite insulation is what sets Wiggy brand insulated products apart. What is Lamilite and why does it perform better than all other forms of insulation? Click here to keep reading & find out more »

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