Clear Case for Sennheiser Momentum 4/3 Wireless Earbuds, Hard Shell TPU Case for Momentum True Wireless 4/3, Full-Body Anti-Scracth Protective Cover with Carabiner

I love the clear case made tough for protection

Fits snugly. Tough to get back off but it can be done

Does not fit momentum 3

This hard TPU case is crystal clear and fits perfectly. No adhesive is required to keep it on. I like it better than all the silicone and leather cases that I have tried.

This exterior case keeps the M4s from coming open and flying everywhere every single time they fall out of my pocket, which they often do. A necessity!

I can't comment on longevity or durability since I just received this. What I can comment on is how I'm pleasantly surprised it's a hardshell case. The description says it's TPU. TPU phone cases are soft like materials and stick when I put my phone or pull it out of pocket. I wanted the slimmest case I can find since I still plan to put these in my pocket. This was the only slim case I could find, all the other are "military grade" style. I wasn't too sure about the TPU description. This fits perfect, and looks great.