Personalized Spinal Muscular Atrophy SMA Awareness T-Shirt. Spinal Muscular Atrophy SMA awareness T-Shirt - Vintage Black says research, fight, hope, overcome for an August awareness month event. 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.