I've been wearing SIDI's for the past 17+ years. I found they were good so stuck with them, never thought to try anything else (never needed to). Every pair have been spot on and i have just invested in a pair of SIDI Black rain EVO's for the winter weather. (not too good as a walking boot but great as a wet weather riding boot)
Nothing lasts forever but i have found that they do a fine good job in trying even in the British weather!!
SIDI gets thumbs up from me.
