100% Nylon Button up closure Chest pockets Ribbed cuffs and hem Please refer to the size chart for accurate measurements Size Chart 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 S M L XL Shoulder (in/cm) 18.5" / 47.0 cm 19.3" / 49.0 cm 20.1" / 51.0 cm 20.9" / 53.0 cm Pit to Pit (in/cm) 23.4" / 59.5 cm 24.4" / 62.0 cm 25.4" / 64.5 cm 26.4" / 67.0 cm Sleeve (in/cm) 34.1" / 86.5 cm 34.8" / 88.5 cm 35.6" / 90.5 cm 36.4" / 92.5 cm Back (in/cm) 23.6" / 60.0 cm 24.4" / 62.0 cm 25.2" / 64.0 cm 26.0" / 66.0 cm