Prasm Cotton Zipper-Pocket Wristband Sports Gym Running Jogging - Solid Colors - Size "A" or "B" (BLACK, Size B / 3.37" W x 4.25" L)

Ok for small key (1-2) but doesn't hold much of anything else. I use mostly for my Fitbit.

Used it during a vacation. It didn't keep things dry & took a long time to dry out but I don't know that it was advertised to go in the water. It kept my lip balm handy & that was the main purpose.