Waterproof earbuds that will stay in your ears

What are some good waterproof earbuds that won't fall out of your ears that would be good for someone like my step-dad, who bikes to and from work?

waterproof as in "go swim waterproof", or waterproof as in "walk in the rain waterproof"

because i've been using my 8 year old apple earbuds in the rain no problem, just like any other earbuds i've had in those 8 years to replace them.

just in the rain


Something like these should be fine even in the rain.