If my inReach is ever really needed, it needs to work. While a rugged unit, the screen is a bit of a vulnerability even when the unit is buried in my pack. I made up this cover using 2-inch Schedule 40 PVC pipe, which is actually 2.37 inches diameter. The cut (chord of circle) is about 2-1/8 inches: A couple of sturdy rubber bands cut from inner tube hold it on: I also carry a Gomadic USB power pack (“Portable Emergency AA Battery Charger Extender suitable for the DeLorme inReach SE”) and four lithium AAs which have very long storage life. This reserve power is about 4 oz in a ZipLock, while the inReach itself is 7 oz.