These boot linners are great.  If you are an outdoors man then you will love them.  I used a very simular prodcut when i was in the army and found these after my supply ran out.  They are comfortable, stay up, don't slide sown your leg and bunch up in the boot and dry very quickly when wet.  Also wick moisture away from the foot when sweating.  They wear pretty well but for the cost you can't complian if you go through them a bit faster than a normal, thick sock.  Highly recommended.