Developed for the Australian tropics, Ariat Fishing and Outdoor shirts are manufactured using custom Australian knitted BFMaxFlow™ 100% Polyester, high performance moisture wicking fabric that is not only soft to feel, it’s durable and incredibly cool to wear. The breathability is second to none and what's better is the fabric is rated as UPF50 for excellent sun protection.
Specifications

100% Polyester
Moisture wicking fabric
UPF 50 broad-spectrum sun protection from 97.5% of UVA & UVB rays.
Sewn in Fiji using Australian fabric