You can purchase replacement tips through our Product Support phone line (1-800-554-7724), or request a warranty replacement by opening up a support ticket.
If you would like to open a support ticket, please visit the following link - Submit a Request
For some 3rd party alternatives, please see below:
Comply offers foam ear tips that will fit our in-ear headphones, with the exception of the T5 True Wireless, which have a different type or ear tip connection. They make a few different styles and each has a small, medium or large size to choose from.
Sport Pro Sx-100 http://www.complyfoam.com/products/s-100/
Isolation T-100 http://www.complyfoam.com/products/t-100/
Comfort Ts-100 http://www.complyfoam.com/products/ts-100/
Variety Pack 100 http://www.complyfoam.com/products/v-variety-pack-100/
Dekoni Audio sells their Gemini 3mm ear tips through the following dealer websites.