Trudging through the muck in Sorels may be warm, but the good boots are usually on the heavy side. These keep your feet warm, but without the weight! It's a very refreshing experience. They also fit true to size.  I'm a 7 in tennis shoes and a 7 fit just right.  However, their traction is no better than many of my Sorels. If I am concerned about traction and can get away without the shaft height of a boot, I will always opt for my waterproof Baffin Zip Hiking shoe.