Brrr® Pro enhanced cooling minerals, hyper-wicking, accelerated drying Polygiene® Stay Fresh eliminates odors formed by bacteria Polygiene® Odor Crunch eliminates foreign odors 50+ UPF rating enhanced by the Brrr® Pro technology and proofed by AATCC ultraviolet protection test 183-2010 Elastic, lightweight material with 4-way stretch for mobility 100% sourced and Made in America Polyester/Spandex 90%/10% Weight 6.5 oz