Small plastic boxes advertised as rainproof are $2.00 to $5.00 on eBay. They consist of convoluted foam top and bottom and four tabs for locking the box as well as two small loops on one end for mounting. They are shown elsewhere on this forum as well. The AudioMoth fits nicely without taking any foam out except for porting it to expose the microphone. I drilled out a .5 inch hole (12.7mm) in the lid above the microphone and inserted a a rubber grommet with a .5 inch slot diameter. (The picture I have included shows a smaller .375 inch diameter grommet which I changed out for slightly more exposure.) I have already tested the Moth wrapped in the pink plastic bag in which it came, with only modest attenuation of the signal. I have also included five test I ran for interested parties to compare. The profile is nice and there is no need to glue anything. Simply place the plastic over the microphone before closing the lid. The pressure of the foam and the inside of the grommet will keep the Moth from moving. Apparently I can add only one file. This one is with plastic in place and the foam ported. I am about 7-8 meters away.