If you are looking for a rangefinder or GPS waterproof case, you might want to consider the Clicgear Valuables Bag. It’s designed for the Clicgear golf push cart or any cart that uses 1″ handle tubing, but that’s no reason to limit its uses. It would work in the front of a golf cart or in the side of your bag and you can probably figure a way to hang it on the outside of your bag if you normally ride in a golf cart.
The case is made from waterproof nylon and has both a zipper and magnetic closure. The magnetic closure will come in handy for during your rounds when you don’t want to mess with a zipper. The zipper is great for between rounds.
IF you have a larger rangefinder, like the Bushnell 1600 or the Bushnell Pro 1M, this bag may be a little too tight, but most of today’s rangefinders will work well in this bag.
Note: Laser Link rangefinders will not fit this case.