Ultimate Ears UE DROPS wireless earbuds use a FitKit process to create customized molds » Gadget Flow
Amazon.com: Ultimate Ears FITS True Wireless Bluetooth Custom Fit Earbuds, All Day Comfort, Built-in-Mic, Premium Audio, Passive Noise Cancelling Earphones, 20 Hour Playtime, Sweat Resistant - Dark Blue : Electronics
New UE Fits true wireless earbuds can mold to your ear shape for a perfect fit - The Verge