Your pup will be the cutest sidekick wearing this Robin Dog Costume. If you're looking for fun Halloween pet costume ideas you'll love this outfit! It's made of a soft polyester material and fits most smaller breeds. This shirt-style costume comes with a yellow cape and black fabric mask and features green sleeves a red chest with Robin insignia on the chest area. Just slip his paws in the leg openings and place on his and he's ready to fight crime!