WTW Rubber Rain Boots for Men Multi-Season Mid Waterproof Insulated Neoprene Rubber Outdoor Hunting Boots

I just want to shovel snow. An hour outside each new england storm. Are these ok for that?

Are they heavy?

Are they neoprene all the way down, behind where the rubber is? Or Does the neoprene stop where the rubber appears to begin? Thanks...

How do i exchange for a smaller size?