Body: 100% Polyester, Collar: 95% Polyester, 5% Polyurethane Embroidered graphics Please consult our size chart to find your best fit How to Measure Yourself Shoulder: Measure from shoulder tip to shoulder tip across the back. Pit to Pit: Measure from one armpit to the other across the fullest part of your chest. Sleeve: Measure from the shoulder seam to the end of the sleeve. Back: Measure from the base of the neck to the bottom of the garment. Size Chart Size M L XL Shoulder (in/cm) 19.7" / 50 cm 21.3" / 54 cm 22.4" / 57 cm Pit to Pit (in/cm) 21.7" / 55 cm 22.8" / 58 cm 24.8" / 63 cm Sleeve (in/cm) 8.7" / 22 cm 9.4" / 24 cm 9.8" / 25 cm Back (in/cm) 28.7" / 73 cm 30.3" / 77 cm 31.9" / 81 cm