Personalized Keep Calm and Go Fishing T-Shirt. Keep Calm and Go Fishing. When things get bad, don't panic. Just go fishing. Funny gift for anyone who loves to fish. 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.