Personalized Trombone Shamrocks Arc Toddler Full Zip Hooded Jacket. Trombone Shamrocks Arc Toddler Full Zip Hooded Jacket - Black are a neat way to show your pride in your brass! 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.