It takes years and years for sheepskin to start to smell - as my slippers can attest. There is some kind of natural antimicrobial in the fleece that kills off the stink-causing bacteria. If a sheepskin smells it's usually due to poor tanning. I don't wear socks in mine. I've found that sheepskin always feels warm and dry from the second I put my feet in them but synthetic always feels cold and damp if I've not long taken them off.
My slippers and boots are Ugg boot knock-offs by Costco (Kirkland) own brand sheepskin. They only come out this time of year so "jump to the phone" if you want a pair. I have problems walking at the best of times so I don't wear the boots outside, only indoors when I'm lounging around and it's very cold. I don't think the boots are great to walk in even if you can walk properly tbh.
BTW you don't have to be a warehouse member to buy. You can have an online only account. It's cheaper and has the downsides of items being a bit more expensive and not all warehouse options are available but membership is cheaper and open to all.
As Loveinamist says, it's the capillary action that they mean when they say moisture wicking. I'm not sure how effective this is in Cozee Home items compared to branded sports clothes but I found the bedding okay and not sweaty as such. I have terrible night sweats and use M&S teddy fleece (I couldn't find anything like it with CH when I was looking) with a wool duvet. I find that if I wake up with a sweat I can fling the duvet off me, go for a pee then get back in bed but still be warm. I gave up on cold soggy cotton sheets after every loo visit when they first brought CH to QVC.
Some clothes and shoes are impregnated with anti-bacterial treatments, or are have naturally antibacterial composition. I was part of a trial for a company using silver fibres in their products. They asked us to use their t-shirt for an hour or two a day for a few weeks without washing, preferably without anti-perspirants. It actually worked. Mr. AE's lasted a fortnight with daily gym visits, mine lasted a month! M&S period pants have a silver treatment to stop odour and there are several brands using silver in their socks to stop whiffs.
Being a lifelong Sweaty Betty, I've always used talc straight after a shower. I'm big on top and have never had the problems some of my friends have had with soreness or fungal infections. (If you have redness in any creases it's more likely to be caused by a fungal infection so won't go away completely with Sudocrem or other anti-bacterials.) Talc is hard to find now so I'm going to have to settle with the corn starch versions when my stash runs out. I've no idea if that will be effective so I'm hanging on to my Scholl anti-fungal athlete's foot powder (also corn starch so no idea why that was pulled from shelves). It was so much more effective on Mr. AE's regular bouts of athlete's foot when they were stuffed into sweaty work boots than any a/f cream. I'm a bit miffed I have to now wait for my cousin to bring Desenex or Walmart's own a/f powder over from America.
I used to be able to bring my own home along with my Glamorise front-fastening bras (they're great bras aren't they, Battiola? I've only just binned the last one that I'd bought on a visit in 2010). I'm happy to see we can now buy them over here but, boy, have they gone up in price!
And now they've pulled Odaban powder! I've used it for years as it was the only thing that would stop Mr. AE's work-issue boots from stinking to high heaven. I've used it to prevent smells in summer sock-free shoes and cure smells already in shoes. It NEVER failed me. Gutted!