https://www.treehugger.com/green-home/should-you-wash-new-clothes-wearing-them.html
"New clothes are dirtier than they look. First, there are the dozens of people who may have handled that garment in the store before you chose to buy it. Whether they touched it or tried it on, you have no idea how clean their hands and bodies were.
A professor of dermatology at Columbia University Medical Center, Dr. Donald Belsito, told the Wall Street Journal that lice and scabies can linger in clothing (although other sources say the risk of this is very slim).
"I have seen cases of lice that were possibly transmitted from trying on in the store, and there are certain infectious diseases that can be passed on through clothing." Lice can’t last long without a host, but they do tend to attach better to natural fibers than synthetics.
Then there are the chemicals added to clothing throughout the production process. Most synthetic textiles are dyed with azo-aniline dyes, which WSJ reported "can cause a severe skin reaction akin to poison ivy in the small population of people allergic to them. For others, reactions to dyes are less extreme, and may result in slightly inflamed, dry, itchy patches of skin." Even all-natural fabrics contain chemicals used to fix brightly colored dyes, such as brilliant red and royal blue.
Anti-fungal agents are sprayed onto clothes when packed for transportation to protect from moisture. These sprays contain formaldehyde, which causes eczema and respiratory irritation in many people.
Keep in mind that, although chemical laws might be stronger in the country where you're shopping, they may be far more lax in the place where the piece of clothing was produced, so you never really know what you're getting with imported products.
Are some clothes more important to wash than others?
Lana Hogue, a clothing manufacturing expert who teaches classes at Garment Industry 411, told Elle that the most important clothes to wash are those worn right next to the skin and ones you'll be sweating in, such as athletic gear.
"If you're going to wear it out and in the heat and sweat in it, you should launder it. Sweating opens your pores and allows your skin to absorb the chemicals in clothing."
Hogue's top wash list includes socks, underwear, undershirts, athletic wear, t-shirts, shorts, summer dresses, and swimsuits that you don't plan to wear in the water immediately. Less important are swimsuits that are going straight into the water (although this raises environmental concerns), fancy evening wear, and outerwear such as jackets. It's very important to wash baby clothes, as well, since newborn skin can be highly sensitive. (I tend to think that if you're going to do it for a baby, you should just do it for the whole family.)
What about second-hand clothes?
Thrift store shopping is safer when it comes to chemical exposure, since used clothes have already been washed countless times. Hygiene concerns remain the same, so it's still a good idea to wash before wearing."
https://www.forbes.com/sites/quora/2018/02/14/do-you-really-need-to-wash-new-clothes-before-you-wear...
https://www.huffpost.com/entry/wash-clothes-before-wearing_n_5ac64e0fe4b07a3485e207fc
https://www.thespruce.com/wash-new-clothes-before-wearing-2146345
There are plenty more articles out there...
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We seem to be getting closer and closer to a situation where nobody is responsible for what they did but we are all responsible for what somebody else did. - Thomas Sowell
