I have very tangly hair even though it is now shorter. Mine gets very tangly with sailing due to the wind and with swimming and snorkeling. All here have good suggestions. I dd the braiding once and it was easy but not for everyone. I like to use a spray in conditioner after towel drying (also use a regular conditioner after shampoo) that is made for detangling. This makes the comb out much easier and I always bring a very wide tooth comb. Getting a neoprene piece that slips on the back of the mask also helps keep the strap from getting tangled up in your hair.. Most dive shops sell these and they also make it easy to identify your mask from others. Doing one long braid (or two) or a ponytail most of the time when exposed to wind and in the water also helps.