Thanks for your feedback. In order for your JBL Endurance Race TWS to give you a tight seal within your ear canal. First, angle the eartip slightly downward to make it easier to insert into your ear canal, then gently twist the earbud to fit it securely into the shape of your ear and continue twisting the earbud into your ear canal to achieve the best seal and secure fit. It is best to try this with all of the provided eartip sizes until you find the one that accomplishes this most easily. Alternatively, you can try other ear tips from a third-party retailer that is compatible with our JBL Endurance Peak 3 and will fit your ear. If you need further assistance, please contact us.