When does the STYLE product expire? I purchased one about three years ago and am wondering if it is still usable.

All our products conform to an industry-standard expiration date of 30 months from the date of manufacture. It sounds like your STYLE might be past that date. This may result in changes in scent, color, and effectiveness, and in the worst case, the preservatives in the product may no longer control any bacteria introduced into it over time and use.