This is a great way to keep your hands dry in wet conditions. The Innova Sport sack leaves no residue on your hands, just a nice grippy feel that can save you some strokes on the course.

The sportsack was real nice for me this weekend in the pouring rain. For my first round it kept my hand dry right before my throws. I kept it in my zipped pocket and right before my throw I would kneed it in my hands inside my pocket to get the extra moisture off my hand. By round 2 it was a bit wet and stopped working as well, but that is to be expected in driving wind and rain for a full day. 

4 stars because the morning after the bag is still damp. 

This bag works great on moderately humid/hot days.  I keeps my hand dry enough to get a solid grip on my disc and i even use it to wipe the discs with from time to time.  I think the dynamic disc dirt bag provides even better drying action, but it makes quite a mess compared to the innova bag.  I find the innova bag is currently the best option on the market making the least mess in your bag or pocket.