Review on Enhance Your Music Experience: 12 Premium Memory Foam Ear Tips for Powerbeats 2 and Most 5-6.3mm In-Ear Earphones - Noise Reduction, Dustproof, and Long Lasting by Faliere Jorge

Update: One of these got stuck in my right ear after a quick cut (they didn't fit my Anker Liberty Air 2 case). Luckily he got out, but he went straight to the trash can. Luckily there are others inside and they are cheap. I would consider that when buying. First review: They were bought to keep the buds in my ears and I heard the memory foam tips would help. They absolutely did, but not without cutting off a small piece. Without these, they will not fit the Anker Liberty Air 2 headphones as they will not fit in the charging case. That or you have to crush them and that will eventually destroy the memory foam. (And possibly a charging case). In short, it's a cheap way to keep the earbuds in the ear properly, but some may need an earcup.