Description comes directly from the 509 website:
Give yourself an added boost under the hood with the everyday wear-ability and enhanced performance of the 509 Covalent Tech T-Shirt. This premium tee goes the extra mile with a proprietary fabric that’s highly breathable and fast-drying and features the perfect amount of stretch to keep you moving. Step it up from your standard cotton t-shirt and experience the difference of 5-Dry performance from 509.
Improved materials and stretch
Comfortable next to skin
Flat lock stitched seams
Made in U.S.A
WARNING for California Residents
Warning: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
What is Proposition 65? "Proposition 65 requires businesses to provide warnings to Californians about significant exposures to chemicals that cause cancer, birth defects or other reproductive harm. These chemicals can be in the products that Californians purchase, in their homes or workplaces, or that are released into the environment. By requiring that this information be provided, Proposition 65 enables Californians to make informed decisions about their exposures to these chemicals." To find out more, visit https://www.p65warnings.ca.gov.