DingoDingo Men's Rev Up Western Boot, Red, Medium

made in USA? What does "imported" in the listing mean then?

Can they be used in snow?

Can someone please clarify what the letters after the number sizes indicate? I'd love to have a pair of these boots.

Is the top of boot narrow? I am looking for quality boot with easy access for someone with hip problems where he doesn't have to bend to zip/unzip.