How to Choose Base Layers

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The REI Silk long underwear bottoms are smooth, soft and incredibly comfortable. They'll help keep you warm on a cold day and they work great under additional layers.
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View all REI Co-op Men's Base Layer Bottoms| Best Use | Multisport |
|---|---|
| Fabric | Silk |
| Fly Opening | Yes |
| Underwear Weight | Ultralightweight |
| Inseam (in.) | 30.5 inches |
| Gender | Men's |
| Sustainability | From a Climate Label Certified brand |
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Let me start by saying that I love this product. It wears like a second skin and is perfect on cold days to add an extra layer of warmth without bulk. As a motorcycle rider, these are great on cold mornings. But . . . they do not last very long. Yes, they do get snags occasionally like any other sheer material. And let's be honest, if you have long toenails, you need to be extra careful putting them on. But that's not my complaint. Almost every pair I have tears at the seams near the crotch within a month or two. At $50 per pair, and needing a few pairs to wear during the winter, this is way too expensive to replace them every few months,
These are great quality, but as several other reviews mention they are really thin. If you are looking for something to just keep your pants off of your skin on cold days when standing outside at the bus/train/subway stop, these will fit the bill. These would also be fine for a cold office. But if you are doing any type of strenuous outdoor activity, you might want to consider moving up to the lightweight version. And as others have mentioned, considering how thin these are, you can't expect them to last more than a season or two at most. It just isn't reasonable to expect that. A special thank you to R.E.I. for offering a product like this.
Having read all the reviews I am still deciding whether to purchase this item as a gift, so cannot comment specifically. But many reviewers mention the garment developing "runs" or holes. Just in case anyone here doesn't know, for decades ladies have used clear nail polish to stop runs in "nylons" (now pantyhose) from enlarging. Just immediately paint over the snag or around the hole and across the bottom of the run. You don't have to take the pants off first; the polish may stick to your skin as it dries but is easily pulled off, unlike superglue. This won't do anything to stop seams ripping but it will extend the usefulness of the item.
These are extremely comfortable, layering warmth is great. Comfort and function are 5 stars. I found the size chart to be accurate. BUT Unfortunately these are not for use in anything where exertion and bending are required. I used these while I deliver a route so only we’re used to get in and out of a car and up 2 or 3 steps. Did not tuck in boots ever. All seams have now failed after 6 week occasional use. Now are a pair of briefs with a few small stitches still holding legs dangling. Now are unusable. So even though comfy,warm, can NOT recommend cause they fall apart in my experience VERY quickly.
I ordered these online and after receiving them was shocked to see how thin they are. They really are a light weight garment but somehow manage to be warm. Granted, I used them for spring skiing but they are much warmer than you'd think by appearance alone. So the good: lightweight & warm The bad: The fly is too high for "easy access"; it takes a bit of work to use the restroom. Second, I'm concerned about long term durability of these. I was taking off my ski pants and the edge of my suspenders caught on the fabric, leaving a tear similar to what you would see in pantyhose. I'm going to keep an eye on that hole next year and if it grows I plan to return these. Overall I still recommend, but not without reservation.
Many of the comments about silk products center around durability. Well guys, it's silk we're talking about here, so let's just keep that in mind. They're going to blow out at the elbows for sure, and probably the knees too, after a season or two or three depending on your level of usage. These are not meant to be family heirlooms. But they are a little slice of heaven on earth, and also make for the best pajamas ever. When mine blow out I cut them off at the elbows or knees and continue to use them as base layer (after layer after layer after layer) and extend their useful life for years. I've been doing this for literally decades. That way they're still regulating your core temperature, which we all know is the key. So just be realistic and enjoy these wonderful garments for what they are! Note: they are fail-safe Christmas presents!!!
The good thing about these is the comfortable fit. They can easily be worn under any clothes. And going indoors does not lead to feeling overly warm. That's the great thing about silk. Earlier models felt a bit smoother still, but these are fine as well, and probably a bit more durable. I tend to have problems finding the opening, thus need to "grope" more than I like. That's the only minor complaint. Paid a lot of postage to have them sent overseas, as I knew these were what I wanted again.
These would be half a bargain at half the price. The thread count is sparse compared to 3 other brands I've purchased for equal or less money in US stores. The elastic band is thin and flimsy and matches the fabric. After the third wash (cold water with wool sweaters and wool long underwear) and air dry, the fabric shrank so bad I thought I had put on my wife's by accident. Advice is to find another brand if time allows. The cost for these is far more than they are worth.
The weight of the fabric is not what it once was. The current silk long underwears are very light and sheer. They are still warm, but their useful life will be real short unless you pamper them. The enemy is the 'run', which occurs when the material is snagged. It is virtually unreparable. wear an outer garment, be mindful when putting the garment on and taking it off. Turn diamond rings inward and cup in a fist for example, wear socks before running snaggle nailed feet down the leg, etc etc.
Over the past 30 or so years, I've used a few brands of men's silk long underwear. There's a few things about silk cold weather inner-wear that I've learned through trial and error. First, concerning this particular brand, is the REI care label misinformation: You should NEVER machine wash silk items; hand wash in COLD water using a mild soap like Mrs. Meyer's Clean Day hand soap. Secondly, do not wring the garment; squeeze the water out as best you can. Thirdly, NEVER use a dryer; always line dry. Following these steps will minimize shrinkage. Notice I wrote "minimize" but not "prevent". Lastly, there have been concerns expressed about the "sheerness" of these silk long underwear bottoms. Don't let that fool you! They will, in fact, help maintain body heat without the bulk of traditional cotton long johns. And guys, keep your toenails trimmed short so they don't snag/run the material when you're putting them on.
From feedback to field testing, all of our gear is dialed-in by REI Co-op members. Their adventures informed every stitch and detail—making for better, longer-lasting gear.

