BREATHABLE!!!!
Best / Most comfortable I've ever used... Might even stop you from bitchin' about long walks out at Chatham
...
Really - they are great. I always heard people saying how much better they were but I just didn't believe until I got a pair, and they've lasted thru Cutty, Weekapaug, Gansett, and all these other rocky places... Get the stocking foot/wader boots combo...