8.3 oz/ly (CA), 5 oz/sq yd (US), 169 gsm (EU). 100% RING SPUN performance polyester jersey with wicking technology. Side seamed. Taped neck and shoulders for comfort and durability. Tear away label for private branding. Snag resistant. Breathable. UV protection = UPF 38. Commercial laundry tested 50. Classic fit. OEKO-TEX® STANDARD 100.   *OEKO-TEX® Standard 100 certification applies to blank apparel. 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. Printing Tips