After a couple of months of swearing every minute while riding my bike to work and back because my buds/tips keep coming out, and after trying at least 20 pairs of silicons tips I've had from other in-ears I did a bit of homework and realised I needed foam tips/buds and especially Comply. I bought some of their Comply T500 Sports at £15 for 2 pairs and they matched expectations - https://www.complyfoam.com/products/s-500/ Not only they did stay solid in my ears (you squash them first, put in your ear and they expand out) but the bass also became richer. At the same time I decided to buy some cheap foam tips off Amazon at £5.99 for 6 pairs and tried them today - https://www.amazon.co.uk/gp/product/B0719H728R/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1 Let's just say that I can't hear/feel the difference between the dear Comply and the cheap ones! I suppose time will tell how long they last but it will be a long time before I'll have an answer. So any ideas of other tips I should test?