Personalized Trombone Santa Hat Robot Baby Bib. A robot wearing a Santa cap and holding a trombone is a funny gift design for low brass musicians, music teachers and school students in concert and marching band at Christmas time. Our Baby Bib is rated high in convenience and durability and with a variety of fashionable colors, your baby can be trendy. Mix and match to any outfit. 100% cotton ring spun combed heather colors are cotton-poly. Width 7.75", Length 11.75"