It’s my understanding that there’s at least some evidence that negative ions in the air can improve mood. Although in such a woo-heavy area it’s hard to know what’s faked and what isn’t, especially if you aren’t an expert and I’m not. However, that doesn’t mean that negative ions in sleepwear would have the same effect as negative ions in air (just as water has rather different effects if you bath in it or try to breath it). Nor do I see any way for the sleepwear to maintain a charge, assuming it actually is manufactured with “negative ions” the first place. A real “negative ion suit” would require a power source, and going to sleep wearing something that plugs into a wall socket strikes me as uncomfortable and potentially dangerous even if it actually did any good.
Bottom line; it screams woo, and if you want negative ions buy one of those plug in negative ion generators. At least they actually can generate negative ions.
A disturbing possibility - if wearing ionized pajamas (or undies) leaches the toxins out of your body (like the ionic foot baths are touted to do), will your sleepwear and underwear turn an oogy brown or black color? If you have to use extra Tide to launder out the goop, will that neutralize the helpful ions (or re-introduce toxins)?
