Product Description Specifications For extreme lightweight comfort, check out the Freedom AMP 4. You’ll love the breathable material this shirt is made out of. When comfort and temperature control are on the top of your list, the Freedom AMP 4 is a great choice. Attributes: MPN: 19688562645 Size: Medium Color: midnight navy/steel Age Group: adult Gender: male Material: 60% Cotton/40% Polyester Gender: male Age Group: adult