1. Tech21, only sold at T-Mobile. About $30, but worth it when you see the YouTube video demo. Also search for the thread here discussing it.
2. Spigen Clear Ultra Hybrid. $10 -$15. Totally clear, very flexible and protective. It was my favorite for a few weeks until I got #1.
I bought a dozen more, not worth mentioning except for the Spigen Black Ultra Hybrid with clear back. But #2 (another Spigen) is better.
Still, Tech21 beats them all.
Sent from my Nexus 5 (LG-D820)