The Best Health Care Site Dot Com’s Acne Blog leads to an decent bacne article entitled How To Deal With Back Acne (bacne) that you might want to check out.
The article, by Kat Daez, specifically speaks about the types of clothing that will cause bacne breakouts.

First on the list is bras.

Here’s why:

• tight fitting
• traps a lot of heat and excess sweat

Bras are a veritable breeding ground for bacne causing bacteria. Your remedy may be to get the correct bra size so that you’re not squeezed up into something that too small for your body. You might also want to take the time to wipe yourself dry every so often so that sweat doesn’t have a chance to build up.

The next thing Kat Daez discussed in the article was synthetic fibers.

Here’s why:

• skin can’t breathe properly
• extra friction can cause the irritation that leads to bacne

The best fabric to wear to prevent unsightly bacne breakouts would be cotton. At the very least were something cotton under your clothing.

Here are some other tips given in the article:

• use a mild cleanser to remove excess sweat
• use baby powder to absorb sweat and prevent friction
• don’t scratch your pimples
• don’t expect immediate results, give it time to work