While a thong is best, you can wear any underwear you like. My wife worked at a spa and she always laugh when the customers asked when calling “do I bring underwear? read more
Women, keeping your underwear bottoms on is fine, but if you keep your bra on, it makes it difficult for us to work on your back. Men who wear boxers, loose fitting ones are best. Boxer briefs make it a little more difficult to work certain areas of the hips/thighs, but it is still manageable. read more
The one exception: when you're on your period. If it's a heavy flow, you definitely don't want to be naked, for obvious reasons, but you may want to keep your underwear on during a light flow too. read more