6.5 oz., 65% polyester/35% cotton jersey (Light Steel = 90% cotton / 10% polyester). Longer length and oversized pocket are just what you need on the job site. X-Temp technology is designed to adapt to your temperature and activity to keep you cool and dry for all day comfort. FreshIQ advanced odor protection technology attacks the odor-causing bacteria in your clothing that causes your t-shirts to smell ? so now you can feel fresh all day. CoolDri fabric dries faster for maximum comfort and has a UPF rating of 50+ for protection against harmful UV rays.