Mission Men's VaporActive Compression Shirt Body: 54% Polyester/36% Cocona 37.5 Polyester/10% Spandex; Mesh: 47% Cocona 37.5 Polyester/53% Polyester Imported Compression fit; evaporates sweat and dries ultra-fast Permanent technology built into the fabric never washes out or degrades UPF 50 protection; durable, anti-odor defense prevents the growth of microbes and bacteria Flatlock seams and zoned mesh panels provide ultimate breathability Ultra-light stretch material enhances mobility and provides a full range of motion