3-In-1 All-Terrain Dog Jacket Medium (M) Red All Seasons Jacket can be worn year round Nylon outer raincoat has detachable hood that protects from wind and rain Fleece inner shirt can be worn separately as a cozy top or with shell in cold weather Shell 100% Nylon and Fleece 100% Polyester Medium fits back length 12" - 16" and chest girth 18" - 22"