Personalized 15th Anniversary Heartbeat Couples T-Shirt. 15th wedding anniversary T-Shirt - Purple with matching husband and wife heartbeat logo also makes a nice Valentine Day gift. 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.