Personalized Music Booster Hands Toddler Full Zip Hooded Jacket. Music held up by the hands of the word booster is a humorous design for dedicated music supporters and a fun way to show your involvement. 7.5 oz., 60/40 cotton/polyester. Jersey-lined double-needle hemmed hood. Pouch pockets for all their treasures. Coverstitched shoulders and armholes. Coverstitched rib waistband and cuffs.