I've had a pair of Browning 2000 grain thinsulate for 2 years now. They started leaking right around my small toe (where it bends) late last year. Although they kept my feet very warmin the tree stand, it was getting there that was hard because they are a real heavy boot. I couldn't walk very far in them because of the weight. I'll bet they have to weigh at least6pounds each.I too have a real problem keeping my feet warm. I've tried many different ways without much success. My feet sweat and it tough to keep my feet warm while sitting in a tree stand for more than 4 hours in 10-20 degree temperatures. I have been leaning towards buying a pair of muck boots this year.