I have very big and wide feet. 14 10E. I was afraid their biggest size, 14, would be too narrow. But the fit perfectly. I wore them in 85 degree weather and did not sweat in them. I did not get a chance to try them out in deep water, but I did do a lot of kneeling in mud to take pictures. They kept my knees and lower legs dry. They did not sag or feel baggy. They came clean fairly easy just by hosing them off.