Personalized Worlds Best Trombone Player T-Shirt. Cool trombone player gift has Worlds Best trombone saying in two tone sports style design and comes on this fun trombone T-Shirt - Cyber Pink gift for your trombonist in marching band or jazz groups. Everyone loves our Custom T-Shirts! Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.