Personalized Sleep Disorder Specialist Gift Men's V-Neck T-Shirt. Sleep Disorder Specialist Men's V-Neck T-Shirt - White has worlds best logo on this thank you gift idea for a SDS. Sports style blue logo. 4.7 oz., 100% pre-shrunk cotton Narrow, set-in 1x1 mitered V-neck collar Shoulder-to-shoulder taping Double-needle stitched sleeves and bottom hem