Thanks for the tip. I'm in the market for a second pair of boots. My Rockys have served me very well but hunting nearly every day during the fall leaves them a bit moist inside during warm weather. I've been looking at 1000 gram boots too but decided against it. Hear tell anything over 800 is just marketing hupla. My 600's are warm enough during the fall, when it gets cold (Minnesota Cold!) I'll be wearing my packs anyway.