I recently ordered two more pairs of the isolate buds, only because after ~3 years I lost my original pair. Now I'll have a pair ready to go if that ever happens again. About 2 years ago I ordered 6 sets (come in packs of 3) of my sized tips for them and only used two of those. So one set of the buds and one set of the replacement tips should go you 4-5 years of ear protection.
Basically as per my title, I can't live without them. I ride a motorcycle and electric scooter as my primary transport and ear protection is an absolute necessity, and you don't need to fork out $200++ for crazy custom molded buds, the flare isolate do an amazing job, are comfortable, cut the noise you don't want and the absolute volume level yet let through what you do wan't/need to hear.
After losing them I tried some foam earbuds provided by work, after 1 ride to work I ordered the extra sets of isolate. For the money I can't rave enough about them. I can't imagine how good their other products are when these are 50 bucks.