I have a Pyrenees mix - German Shepherd and Pyrenees - and he has more hair than any dog I've ever seen except for a Chow I used to have. It's a dense coat with a super fluffy undercoat, VERY good insulation, but has to be brushed A LOT. He has NO trouble with cold weather, but does suffer in the heat and I clip him down quite close for the summer (a job I wouldn't wish on anyone). But he's the sweetest guy, quiet and gentle, a great livestock protector and is very alert to overhead predators, won't let a hawk or eagle get near his territory. In Florida, though, I think he would suffer a lot from the heat.