I started hunting a particulary wet, mucky area about 15 years ago. After going through a hand ful of "standard" rubber boots and a pair of Muck boots, before the 2010 season I bought a pair of Irish Setter Exoflex, uninsulated boots. I am 6'1" and 275#. To say the least my lower legs are not "thin" and tromping around in swampy, mucky areas can put a lot of strain on a rubber boot. THese by far and away have held up better than even the "best" of the others I busted apart. They go on/off a lot easier and give me very nice support. I usually walk in 1/2 to 3/4 mile and on hot days the upper neopreme ( I think) can be pretty darned warm. But no worse than the other rubberized boots. Pricey, but I have gotten 2 full years of hard use out of them and they look to be in very good shape for another.