They rarely get stinky (even with daily wear and we only wear these shoes in the spring and summer) but they do get dirty. I plan to use these for a long time. So much to say for just one product! But I wouldn’t use it in an apartment. Lots of whiz gigs that don’t really deliver. Quite impressed with the lasting of the battery and the clarity on the phine conversation really good! Was a gift for 18 yo girl - she wears it all the time! Ive been walking/running for over 10 years in minimalist shoes, starting with Vibram "toe shoes," but they stank to high heaven. This is the second headset I buy from Runmus. Once installed, I yanked on both rather strongly and they were sturdy.