DIY: Drysuit Undies???

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616fun

Contributor
Scuba Instructor
Divemaster
Messages
848
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122
Location
Indianapolis, IN
# of dives
200 - 499
Ok,
So I will get my new CLX450 Sig. Series next Tuesday. I'm realizing my 100g thinsulate isn't gonna cut it in this suit. The cost of drysuit underwear seems very costly.

My mother in law is very good on the sewing machine. Why couldn't you just whip up some good undergarments on your own?

I found a fabrics retailer (Outdoor fabrics, technical fabrics, ripstop, waterproof fabric, outdoor fabric, zippers) that sells Primaloft, a wickaway fleece, and nylon materials to sandwich together to make something similar to the White's MK3.

Am I missing something? I think I can get MIL to sew these for the cost of materials, which should be less than $125.
 
Ok,
So I will get my new CLX450 Sig. Series next Tuesday. I'm realizing my 100g thinsulate isn't gonna cut it in this suit. The cost of drysuit underwear seems very costly.

My mother in law is very good on the sewing machine. Why couldn't you just whip up some good undergarments on your own?

I found a fabrics retailer (Outdoor fabrics, technical fabrics, ripstop, waterproof fabric, outdoor fabric, zippers) that sells Primaloft, a wickaway fleece, and nylon materials to sandwich together to make something similar to the White's MK3.

Am I missing something? I think I can get MIL to sew these for the cost of materials, which should be less than $125.
There's no reason you can't, although I'm a little baffled that you're spending $2500+ on a drysuit and then being cheap about the part that will keep you actually comfortable (the undies.)

Seattle Fabrics (Welcome To Seattle Fabrics. We offer marine fabrics and outdoor fabrics such as Neoprene, lycra, sunbrella and more!) is also an outstanding supplier of all kinds of outdoor and technical fabric. I think you'll find the "Green Pepper" series of patterns, in particular, to be useful for your quest.

I did my own pair of 400g thinsulate booties for my suit, but that's because I wanted a tailored fit, and a taller sock than the DUI or Diving Concepts ones provided, and better technical insulation than the flea-Bay cheapies. The end cost, despite being reasonable competent on a sewing machine, was about the same as buying a good set, though, and the time spent was way more. I had fun, though, and I did get a better set of drysuit booties to keep my feet toasty.

A word of warning - you'll need something like a light-industrial grade sewing machine, not a "home grade" sewing machine to do this right, without a lot of frustration. Fleece + a shell of nylon + 400g thinsulate will NOT sew easily on a home machine for piece joins without a walking foot...and I still stalled out the machine a lot and broke plenty of needles...on a very good Bernina. You really MUST have the walking foot on a home machine to take your chances, at a minimum. Preferably, you should not attempt heavyweight undies without a real (separate motor type) light industrial straight-stitch machine. It'll be a nightmare and look terrible, if you even manage to finish the job.

BTW - you're doing this to save money, which is a basically the worst reason to DIY... in the end, if you add up the time, even at minimum wage, you're not going to save anything over buying a reasonable pair of undies. For instance, if you shop around, you can get the very well made Pinnacle Merino Evolution undies for $250 a set...that's basically 650g and the warmest undies you'll find amongst those who actually publish ratings for their suits (clo values...unfortunately, a lot of manufacturers don't share these values).

If you shop around, there are some discount brands (or even good brands) in the under-$200 range, especially if you don't need such a heavy set. Or just find some fleece jumpsuits at REI to get started, if you must.

W/r/t price, the DUI undies are very, very nice - warm and well made. They're also overpriced, though. There are just as good, if not better undies at a much more reasonable cost, and the frustration you'll find DIYing it to try to save a few bucks won't be worth it.

Of course, if you're oddly-shaped physically, or you want a feature that the commercial sets don't have, then yeah, go for it. It's not rocket science, and it's not particularly hard...although quilting all the layers for a set of undies is, from experience, a pain and will take you many times longer than you think.
 
Not trying to save money at all. Just seems crazy the cost of the undies. I think it's principle as much as anything.

I found a Bare T200 for $150 on eBay I picked up today. I also am seriously considering the Fourth Element SubXero before winter comes. That said, I'd still like to take a shot at making them on my own. If nothing else it can go on the shelf with that half done can light :)
 
You might look at Pinnacle's undergarments. Pinnacle has a few different styles of undergarments of varying warmth that are reasonably priced. The highest I've seen is their Evolution Merino undergarments. They are 650gm & run just a little over $300. Their 400gm suit runs just over $200, Their 200gm runs about $175 & their lightest undergarment runs about $120. They're not too badly priced for what they are. I have the heaviest & the heavier light undergarment. With the heaviest one, I have done an hour long dive in 41 degree water in Feb. Except for my hands & the exposed parts of my face, I was quite comfy for the dive.
 
I can also vouch for the Pinnacle Merino undergarment. I got this with my Pinnacle Freedom suit and have been pleased with how comfortable it is. I was toasty in 35 degree temps in February. The only drawback is the amount of weight you'll need to get under the water. This undergarment is extremely buoyant.

Sean
 
That's true. I forgot about that. Using a regular BC with an AL80 tank, It took me 46lbs to get & stay down (may have forgotten to burp the suit first- not sure on that). In my double Lp 85's it takes a 5lb v- weight to get & stay down. Good point Bennsarrow.
 
It really depends on how serious a set of undies you need. If you need a pair that will perform on the level of Weezle Extremes or Thinsulate 400, for really cold water, you are probably out of luck - it's hard to find the right grades of material in small quantity, and if you try to substitute materials you can spend a fair bit of money, without producing a really usable suit since many insulators don't hold up well to the compression dive undies experience.

If you need a light to medium duty set, however, the prospects are much better since, for some reason, the suitable grades of polarfleece material are easy to find and much easier to sew into a usable set of undies.

Cheaper too. You can sometimes find seconds of polartec material cheaply, and if you don't care about color, you can even buy leftover bits by the pound for even less.

Put that together with someone who enjoys sewing, and is willing to do it just for fun, and a $20 set of drysuit undies becomes a real possibility.
 
Vance,
Thanks for the DIY at heart mentality.

I have found a reasonable price on Primaloft. Since I'm not too great at understanding the thermal properties of the stuff I thought I'd run it by you. Their website states the heaviest grade they have is 170g, 5 oz. I have no idea what drysuit manufacturer's are using in their product.

I was planning to line the interior with 3.6 oz wickaway lining. The jury is still out on exterior fabric.

For $10 I had them mail me samples of their fabrics. Hopefully more information to come on this little project.
 
Military Surplus,

A cheap alternative are cold weather polypropylene undergarments, used by the military in ECW (Extreme cold weather) applications. I am active duty military and was issued a set when I got my cold weather gear, but they can be purchased fairly cheaply on the open market. They are non-moistrue absorbing and very warm. Try this link if interested.

Polypropylene Thermals - Cold weather underwear - Military PolyPropylene
 
I ordered my under garment off a guy on ebay for 80 bucks. He makes his own undergarments which are very warm and the sewing jobs very professional. His suits are the same fleece used in brandname suits three times the cost and I like the idea of supporting his basement operation rather then over priced brand names. I dont have the name handy but you should find him on ebay. Not quite DIY but supporting someone with the time to do it themselves for you.
 
https://www.shearwater.com/products/teric/

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