I haven’t for one moment regretted the purchase of my Dyson Supersonic Hair Dryer, which absolutely cuts your drying time in half, if not more, and leaves hair meaningfully smoother and less damaged. It’s a little impractical to shlep it out to Sag Harbor, however, so out there I’ve always just used a succession of cheap blow-dryers, and I can really see and feel the difference that makes, especially because the sea air and humidity already do a real number on my frizzbo hair. It’s kind of a mess. So I caved and bought this Harry Josh blow-dryer for Sag. It isn’t cheap but costs about half as much as the Dyson if you show the slightest interest in it on the Dermstore site, because they’ll send you offers for it at a reduced price (which is how I scored it). And I think it works pretty much just as fast and well as the Dyson. OK, your turn: what’s the one beauty product, tool, or treatment that you will spend ridiculously on?