I received the non insulated Aku Selvetica boots. I give them 4.5 out of 5 stars. One boot was tighter, but a simple blow dryer with heat and a couple pairs of thicker socks did the trick. Used them today for about 3.5 hours. I was comfortable, ran into some water and feet stayed dry. The laces are long, but maybe that's a preference thing. If they have a insulated boot like 400 or 600, I would definitely recommend. They were on sale for $90, so it was easier to buy than original price tag. Follow there sizing guide and add a thumb width. Size will be perfect in my opinion.