Personalized Musical Triangle T-Shirt. The musical triangle disappear in it's complexity text with the image of a triangle is a humorous play on the Bermuda triangle and a funny gift design for percussionists, music teachers and students in orchestra and concert band. 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.