Unless you have something like MCS to perfumes you probably wouldnt notice the "smell" on them at all. People without this kind of sensitivity dont.
Buying them from any store which also has perfumes and fragrances can mean the cotton has taken on board some of the chemical fragrances. I have a bit of this issue myself eg I sometimes have to change my clothes after shopping as just standing a metre away from someone wearing deodourant for just a minute or so.. can cause that to go through my own clothes and I'll be able to taste it etc half an hour later after Im home still and it can be making me sick (esp since the chemical may now be sitting on my own clothing near my face. .
If you have a mast cell disorder, this secondly source pick up of chemicals can go life threatening. If my uncle who has systemic mastocytosis ordered in any fabric stuff from an ordinary store..which had picked up perfumes from store.. that would put him into hospital and probably put him into anaphalatic shock. (He gets hospitalised just from someone chewing peppermint bubblegum and the chemicals in the air from that getting to him).
PearlGirl Ive got my support stockings from a medical supply place..of cause they dont have all the fragrances in which a normal store does. I cant recommend to you thou where I get mine from as its via doctors referal and it isnt a internet ordering place as they expect to do fittings etc there. Anyway, consider medical supply places rather then normal stores.
If Im remembering properly, I cant think now what brand is called but the well known sweeden brand I think it is of these (it starts with an S).. I think one could order them directly from the actual company who makes them via online.. rather then ordering them where they have been sitting in a store with other things. The company had the instructions for measuring up everywhere for a pair of theirs on its website.
Make sure you are ordering ones of the recommended pressure for POTS. I tried the ones the pressure below and found I only had a 15% improvement of my POTS (but that was still worth it for me). Next time I get some Im going to try the very tight ones of the pressure recommended (30??) . Issue is the tighter there are, the harder they are to get on and with ME one is often feeling weak so I was struggling at times to put on the lesser pressure ones.