NSF Carla Fitted Mock Neck Tee in Blue. - size XL (also in XXS) NSF Carla Fitted Mock Neck Tee in Blue. - size XL (also in XXS) 91% cotton 9% spandex. Made in USA. Machine wash. Asymmetric neckline detail. Ribbed knit fabric. Subtle raw-cut trim. NSF-WS353. 20624-3X3. Based out of California, NSF has caught the eye of many. With their clean design and boyish charm, NSF is recognized for its relaxed, modern style looks. Shop the latest in fashion from NSF