Nylon vs Polyester

Joined
Aug 4, 2023
Messages
37
I’m gearing up for a muley hunt in central Idaho for mid October. I’m totally obsessed thinking about this hunt and all the different scenarios for weather conditions we might experience.

From the locals I’ve talked to, it could be 70 degrees and beautiful or 20 degrees and blowing snow. I do a lot of whitetail hunting in MI so I’m familiar and comfortable with sitting in the cold/snow/rain for hours at a time.

I am less familiar with hiking in ~60lbs of gear plus meat. I realize even in cold, hiking hard while weighed down, I will probably need to strip down to some light layers to avoid sweat-soaking my gear.

Im a huge fan of merino and “regular” wool, but my king of the mountain gear is so heavy I don’t think it’s warranted for a trip like this. I do have some Pendleton 100% wool board shirts which I plan to bring as a lighter mid layer.
My baselayers for this trip will be merino, but I would like to avoid wearing the baselayers with my backpack in direct contact , to avoid damaging/overworking the merino.

I’m thinking lightweight synthetic pants and shirts will be great for periods of sweaty hiking/hauling. Dries quick, more durable than merino and a lot cheaper if it does get worn out/damaged.

I’ve noticed most hiking pants are 100% nylon and most hiking shirts are polyester.
In fact , many things in my normal wardrobe have some blend of polyester.
I’ve also noticed i hate wearing anything 100% polyester for extended periods of time. Dry-fit type shirts claim to be sweat wicking and quick drying, but I find that they kind of keep me in a low-grade sweating state. I’ll sweat a little bit, and it will like half-evaporate leaving a slimy layer between you and the shirt. And as we all know, these shirt’s eventually acquire a sweaty mildewy musk that is hard to eliminate.
Heavier polyester layers are extremely warm, but they also make me sweat. In cold weather, they are almost too warm. It seems they almost always cause me to sweat, then I end up in this state of being too hot in some areas and sweaty and cold along my back.
I tend to prefer 100% cotton or cotton-heavy blends, as I find they do a better job getting the sweat/oils off of me, keeping my skin feeling drier even though the cloth will eventually be sweaty.

So… this brings me to nylon. I actually work as a tech service rep for plastics processors, so I’m very familiar with polyesters and nylons in injection molded parts. The basic material properties of these plastics (nylon/polyester) are the same whether in solid form or in filament/fiber.
Nylon inherently can absorb moisture. A small amount, ~4% or so. When it absorbs moisture, it acts as almost a plasticizer… making the material more flexible and “tough” (toughness in plastics meaning a higher amount of “strain” or stretch before snapping/tearing).
It is more “polar”, meaning more “water-loving”, and polyester is more “non-polar”, meaning more “oil loving”. Nylon is a lot stronger/durable than polyester, but polyester has better UV resistance.

So my thought here is that nylon may be a superior synthetic material.
In theory the ability to absorb some moisture will leave the skin feeling drier. Polyester dries quick because it can’t absorb any moisture…. But leaves that sweat between the shirt and your skin. Nylon being less oil-loving should allow easier cleaning and less stink factor.

Polyester is one of if not the most consumed plastic globally. Meaning it is cheap and super available. Which is why I think we see it in almost every article of clothing. Nylon is not a prohibitively expensive material, but much less common in non-raingear type clothes.

I’ve had a hell of a time finding some 100% nylon shirts, but landed on some cheapo Wrangler ATG fishing type shirts. Also got their outdoor pants which are 100% nylon and great for $28.
I plan to wear the shirts around a little bit to evaluate whether I’m way overthinking this or if I’m actually onto something.
The lack of widely available nylon shirts has me thinking maybe there is a reason why people don’t like or use nylon on their upper body as a shirt/base/mid layer.

Also found the outdoor research Ferrosi jacket that is nylon and looks to be a great mid layer to cut the wind and a bit of cold while remaining breathable.

Interested to hear everyone’s thoughts and experiences!
 

fngTony

Super Moderator
Staff member
Joined
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Messages
5,123
Nylon will hold a little more water, more durable, generally a little more wind resistant making it better for pants or jackets. Polyester is a bit lighter, softer and breathable, making a better shirt or next to skin fabric. Both are generic types of synthetic fabrics so you can get some cross over.
 

Adema

FNG
Joined
Dec 26, 2022
Messages
13
Honestly, I would look at a shirt with some type of material blend. For example, the Mammut Trift long sleeve (210 gram weight in XL) is pretty amazing. It’s a wool/polyamide/ spandex blend. While testing it, I wore it everyday for a week straight in the gym for my workout sessions and it never stunk and wicked the sweat away quickly. It’s my go to right now.

I just bought the Black Diamond Rhythm shirt (146 gram weight in a long sleeve) and it too is a wool blend. I haven’t had a chance to test it out though.

My go to polyester base layer is the Jack Wolfskin Infinite shirt (178 grams). I got a few of these for about $25 each on Amazon. They are super lightweight, stretchy, and warm. However they are 95% polyester so, like all polyester, they will develop a smell. The polygiene addictive seems to slow down the stink, but it still happens.

I do have a few nylon shirts, but they are a heavier fabric (weight around 250 grams) than most of my polyester or wool shirts, so I don’t really push myself hard in those shirts.
 

Bump79

WKR
Joined
Oct 5, 2020
Messages
958

One thing you could look at is a blend polyester with merino or low levels of cotton or tender. Like this Blackstock made in USA. Tencel is super soft and it might help make it more comfy against your skin. I find the same as a next to skin layer - 100% polyester just doesn't wick well because in order to wick it needs to pull water off your skin. I also find my skin sweaty.

I love poly/merino blends. I think it's the best of both worlds personally. Dries 50% quicker it seems and I'm warmer than my 100%. Been playing with these other blends too.
 

TaperPin

WKR
Joined
Jul 12, 2023
Messages
1,975
I’m gearing up for a muley hunt in central Idaho for mid October. I’m totally obsessed thinking about this hunt and all the different scenarios for weather conditions we might experience.

From the locals I’ve talked to, it could be 70 degrees and beautiful or 20 degrees and blowing snow. I do a lot of whitetail hunting in MI so I’m familiar and comfortable with sitting in the cold/snow/rain for hours at a time.

I am less familiar with hiking in ~60lbs of gear plus meat. I realize even in cold, hiking hard while weighed down, I will probably need to strip down to some light layers to avoid sweat-soaking my gear.

Im a huge fan of merino and “regular” wool, but my king of the mountain gear is so heavy I don’t think it’s warranted for a trip like this. I do have some Pendleton 100% wool board shirts which I plan to bring as a lighter mid layer.
My baselayers for this trip will be merino, but I would like to avoid wearing the baselayers with my backpack in direct contact , to avoid damaging/overworking the merino.

I’m thinking lightweight synthetic pants and shirts will be great for periods of sweaty hiking/hauling. Dries quick, more durable than merino and a lot cheaper if it does get worn out/damaged.

I’ve noticed most hiking pants are 100% nylon and most hiking shirts are polyester.
In fact , many things in my normal wardrobe have some blend of polyester.
I’ve also noticed i hate wearing anything 100% polyester for extended periods of time. Dry-fit type shirts claim to be sweat wicking and quick drying, but I find that they kind of keep me in a low-grade sweating state. I’ll sweat a little bit, and it will like half-evaporate leaving a slimy layer between you and the shirt. And as we all know, these shirt’s eventually acquire a sweaty mildewy musk that is hard to eliminate.
Heavier polyester layers are extremely warm, but they also make me sweat. In cold weather, they are almost too warm. It seems they almost always cause me to sweat, then I end up in this state of being too hot in some areas and sweaty and cold along my back.
I tend to prefer 100% cotton or cotton-heavy blends, as I find they do a better job getting the sweat/oils off of me, keeping my skin feeling drier even though the cloth will eventually be sweaty.

So… this brings me to nylon. I actually work as a tech service rep for plastics processors, so I’m very familiar with polyesters and nylons in injection molded parts. The basic material properties of these plastics (nylon/polyester) are the same whether in solid form or in filament/fiber.
Nylon inherently can absorb moisture. A small amount, ~4% or so. When it absorbs moisture, it acts as almost a plasticizer… making the material more flexible and “tough” (toughness in plastics meaning a higher amount of “strain” or stretch before snapping/tearing).
It is more “polar”, meaning more “water-loving”, and polyester is more “non-polar”, meaning more “oil loving”. Nylon is a lot stronger/durable than polyester, but polyester has better UV resistance.

So my thought here is that nylon may be a superior synthetic material.
In theory the ability to absorb some moisture will leave the skin feeling drier. Polyester dries quick because it can’t absorb any moisture…. But leaves that sweat between the shirt and your skin. Nylon being less oil-loving should allow easier cleaning and less stink factor.

Polyester is one of if not the most consumed plastic globally. Meaning it is cheap and super available. Which is why I think we see it in almost every article of clothing. Nylon is not a prohibitively expensive material, but much less common in non-raingear type clothes.

I’ve had a hell of a time finding some 100% nylon shirts, but landed on some cheapo Wrangler ATG fishing type shirts. Also got their outdoor pants which are 100% nylon and great for $28.
I plan to wear the shirts around a little bit to evaluate whether I’m way overthinking this or if I’m actually onto something.
The lack of widely available nylon shirts has me thinking maybe there is a reason why people don’t like or use nylon on their upper body as a shirt/base/mid layer.

Also found the outdoor research Ferrosi jacket that is nylon and looks to be a great mid layer to cut the wind and a bit of cold while remaining breathable.

Interested to hear everyone’s thoughts and experiences!
How did your hunt go? Any new thoughts on the synthetics you had on the trip?

Moisture, it seems, is a balancing act between comfort and retaining insulation value. When adding new clothing I’m a big fan of weighing them, soaking them in water and letting all the free flowing water drip off and weighing again. As you know, fibers of all sizes are used in clothing - some polyester sheds water and some doesn’t. Rather coarse nylon, as in hiking pants, sheds water while finer fabrics act like cotton.
 
OP
H
Joined
Aug 4, 2023
Messages
37
How did your hunt go? Any new thoughts on the synthetics you had on the trip?

Moisture, it seems, is a balancing act between comfort and retaining insulation value. When adding new clothing I’m a big fan of weighing them, soaking them in water and letting all the free flowing water drip off and weighing again. As you know, fibers of all sizes are used in clothing - some polyester sheds water and some doesn’t. Rather coarse nylon, as in hiking pants, sheds water while finer fabrics act like cotton.

It was the hardest thing I've done in my adult life no doubt.
Our big hike to our best spot was 5 miles up 2500ft elevation on rutted out dirt bike trail, all south slopes with almost no shade, 85 degree days. We ended up running out of water once we got to the spot - and all the supposed creeks on the map were dried up. Saw a ton of game (one MONARCH of a bull elk) and had an opportunity on a forky but got busted. Probably a good thing we didn't get him, it would've killed us to pack it out. We would've been drinking the blood and urine to stay alive, heh.

I had the nylon giddyup on for that, and it got the job done. Haven't noticed any stink , but the jury is still out on that... haven't worn the stuff enough.
Seemed to be tough enough for the job, but not conclusive since I did all my brush busting in colder weather with my wool outfit.

The differences between poly and nylon are pretty subtle. Its not like that 2-4% moisture absorption makes it feel like merino or something. I still get the weird slimey low-grade sweat feeling, though it might be marginally better than poly. I still think nylon is probably better suited to hunting gear, but more to do with the ability to shed oils/scents... like I said I need to test this over a longer time period.
 

TaperPin

WKR
Joined
Jul 12, 2023
Messages
1,975
It was the hardest thing I've done in my adult life no doubt.
Our big hike to our best spot was 5 miles up 2500ft elevation on rutted out dirt bike trail, all south slopes with almost no shade, 85 degree days. We ended up running out of water once we got to the spot - and all the supposed creeks on the map were dried up. Saw a ton of game (one MONARCH of a bull elk) and had an opportunity on a forky but got busted. Probably a good thing we didn't get him, it would've killed us to pack it out. We would've been drinking the blood and urine to stay alive, heh.

I had the nylon giddyup on for that, and it got the job done. Haven't noticed any stink , but the jury is still out on that... haven't worn the stuff enough.
Seemed to be tough enough for the job, but not conclusive since I did all my brush busting in colder weather with my wool outfit.

The differences between poly and nylon are pretty subtle. Its not like that 2-4% moisture absorption makes it feel like merino or something. I still get the weird slimey low-grade sweat feeling, though it might be marginally better than poly. I still think nylon is probably better suited to hunting gear, but more to do with the ability to shed oils/scents... like I said I need to test this over a longer time period.
Running out of water has to be the worst. Sounds like quite the adventure.
 
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