Personalized Underestimate Old Man Golf Cart T-Shirt. Funny retired golfer T-Shirt - Pacific Blue with golf cart and golfer. Never Underestimate An Old Man With A Golf Cart. 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.