When getting Nano brows, comfort should be your priority. Here are some tips on what to wear:

1. Loose and Comfortable Clothing: Opt for loose, comfortable clothing that doesn't restrict your movement. You'll be sitting for a while, so you want to be as comfortable as possible.

2. Avoid White or Light-Colored Clothing: The pigments used during the procedure can sometimes splatter or smear. It's best to wear something that won't show stains easily.

3. No Makeup: It's best to come in with a clean face. Your technician will be working on your brows, and makeup can interfere with the procedure.

4. No Jewelry: Remove any facial jewelry to prevent it from getting in the way during the procedure.

5. Glasses Instead of Contact Lenses: If you wear contact lenses, consider wearing glasses on the day of your appointment. The procedure might cause slight discomfort, and rubbing your eyes with contacts in could lead to further irritation.

Remember, the key is to be comfortable and to minimize any potential issues that could arise during the procedure.