RED ARGYLE DOG SWEATERRED ARGYLE DOG SWEATER Dog Mr. Dapper. Astute and Charming is what your pup will look like in this dog sweater. This dog Sweater is a worthwhile addition to your tail waggers wardrobe. Best of all,their sweaters are hand knit and 100% wool. The dyes used for the wool items come from plants and are totally natural. Because the natural wool is not treated with chemicals, the sweaters are both warm and dogs love them on their bodies.