6.3 oz/ly (CA), 3.8 oz/sq yd (US), 128 gsm (EU). 100% performance polyester flat tricot micropique. Contrast inset at shoulders and back yoke. Self-fabric collar. Moisture wicking. Snag resistant. Breathable. Tagless. Relaxed fit. Due to the nature of polyester, special care must be taken throughout the decoration process. Please refer to product size spec PDF file for more details.