Saw an pouch/case for an IPhone that had a 1/8" headphone plug and thought I'd give it a try. WM10 fits in it nicely and the connection will allow you to use the WM10 in the rain with no worries. It comes with an arm band and a lanyard so you can put it over your neck if wanted. This should work out well for rainy day hunts where you don't want to be connected with headphones. Total cost to me was less than $20 which included shipping.
QQ-Tech
QQ-Tech