Good rubber - LaCrosse Footwear Alphaburly Pro 18in Insulated 1600G Boots - Men's

The boots are great for hunting rubber boots but they are a little cool after 4 hours in the 40s and I think they should have been warmer than that. I could see if I was close to freezing temperatures but I was in about 43 degrees and with 2 pairs of merino wool socks and I was able to feel my feet getting cold after about 4 hours
It was not unbearable but I was expecting to be able to keep my feet warm I those temperatures