The VA has given me Phonak ones, course they have given me Siemens, in the ear, ones past. Talk to your audiologist about it. My current ones are behind the ear, and sweat is not a factor, my old ones, the in the ear sweat was a factor. Each in the ear hearing aid has to have mold taken, then they make your hearing aid. Watched a How it is Made show once on it, very interesting. Both of mine with a remote control for different kinds of situations, riding in cars, road noise, eating out, going to movies, etc. etc. I didn't have to lay out cash for mine, but I understand mine run about $3K each. Batteries aren't cheap either, I get about 5-6 days out of each battery, battery packs usually have 6 -9 batterys, starting at around $7-8. When I ride, or am fishing in my trolling I usually just take my hearing aids out. My wife is very grateful I have these as otherwise the TV/radio blasts her out of the room.