NSF Saguro Sweatshirt in Blue. - size XS (also in ) NSF Saguro Sweatshirt in Blue. - size XS (also in ) Cotton blend. Rib knit trim. Front screen print graphic. Distressed edges. NSF-WO85. 2759 IWFTR. 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.