Good but not great. To obtain a great fit these foam ear tips possible could be shaped differently. While I realize they are universal fit maybe a somewhat oval shape might be better for some people. Possibly seek the help of hearing professionals as Au.D or MDs.

Workout resilient Fit was good…. Earbuds really stayed put during a tough workout - both during heavy weights and zone 5 HIIT training…

Great customer service and experience Great customer service and experience. Quick turn around on everything i have order.

This is an amazing company to work with… This is an amazing company to work with when you're looking for a perfect pair of earbud adapters, custom made (when you send in professionally created molds of both your ears). They are made of surgical type rubber that's pliable enough to insert into your ear canal, while housing my new Xelento by Beyer Dynamics) perfectly, creating a seal so they stay firmly in your ears and provide for much better noise control and, an awesome sound. Their customer service? world class. Highly recommend them.

Price is "custom", execution is not Price is definitely "custom" (one pays a premium for something that's customized to oneself), but the execution is absolutely not. The ear plugs are really small, and while they fit reasonably well, they do not insulate sound like their larger cousins from ADV sound do (ADV sound is the side of the company that does custom IEM tips, and those both fit in well, and insulate sound much much better). Now I do need custom tips to help me sleep, but these are simply not the solution. They are simply way too small and shallow to work well. In fact, Mack's ear plugs work a lot better (though they are disposable ....) I feel cheated.