It’s a bummer when phones get too hot or too cold, or when your pack lacks a solidly accessible place to stash said phone. The PHOOZY solves this problem. It’s not a cover but a thermal capsule that keeps your phone at a regulated temperature. It also floats and is military-grade drop-proof.
This is a great gift at a reasonable price for anyone who tramps through the elements, using their phone as GPS, camera, and communicator. Add the straps ($9) to rig to any pack or bike and complete the gift.