Navy FusionKnit T-Shirt. Made in ECOPET, a new recycled eco-friendly polyester fiber, it is soft, extremely comfortable, as well as being highly functional. Anti-odor. Special mesh Schematech Engineered knit EC for a superior ventilation. Unique Supersonic (ultrasonic welding) processing enhances wearing comfort by eliminating bulky seams and reducing the number of sewn parts.