Personalized Trombone Santa Hat Robot Women's V-Neck T-Shirt. 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. 5.0 oz., 100% pre-shrunk cotton Athletic Heather is 90/10 cotton/polyester 1x1 rib collar with mitered v-neck Shoulder-to-shoulder taping Ladies' fit