A4 Men's Short Sleeve Compression Crew 80% performance polyester/20% spandex stain and odor resistant t-shirt Tighten up with this comfortable-yet-form-fitting performance crew. 80% Polyester / 20% Spandex, 5-oz. Moisture wicking, odor resistant Stain release, All seams flat-lock stitched 4-way stretch Moisture Management fabric