CafePress - Rockin' My Chromosome Long Sleeve T-Shirt - Long Sleeve Infant T-Shirt Long Sleeve Infant T-Shirt, Super soft material for sensitive skin. 6.1oz 100% combed ringspun cotton. Tagless for comfort. Lap shoulder neckline for easy overhead changing. IMPORTED. We offer 100% money back guarantee, so you can buy with confidence. Your satisfaction is our promise, and returns/exchanges are made easy.