I had never tried silicone earplugs until I tried these. What a revelation. The foam ones used to hurt my ears and I could not sleep with them in. These block out so much sound and are comfortable enough to wear all night. Unlike foam earplugs, these do not expand in the ear they cover the ear opening and stick to the ear (easy to unstick). The stickiness wears off after using about 10 times (ish) so they do need replacing. Although the pack says you should not split them, I find that dividing each plug into two halves works just great, and it makes them last longer, too. Very highly recommended. Never tried them in water, though, so not sure how they'd work for that.