VEA-304-ST-LM High Visibility Safety Features ANSI/ISEA Type R Class 3 Compliant 2" Retroreflective Tape with 360 Degree Reflective Coverage High Visibility Lime - a.k.a. Fluorescent Yellow-Green Reflective Material 3M™ Scotchlite™ Reflective Material – 8712 Transfer Films Shirt Material Lightweight & Soft 4.1oz Performance Fabric 100% Polyester 140 gsm Birdseye Knit Moisture Management Wicking - Wicks Moisture 3X faster than Cotton Minimizes Odor Additional Features Short Sleeve Polo Rib Knit Collar 3-Buttoned Placket 3M™ Scotchlite™ Reflective Materials are certified to meet ANSI/ISEA 107-2015 clause 9.1 and 9.2 for coefficient of retroreflection. Size Guide: VEA-304 High Visibility Polo Shirt - Size Chart A C D Shirt Exterior ChestCircumference Center BackLength SleeveLength SKU SM 38 30 9-3/4 3040K0B MD 42 30-1/2 10 3040K0C LG 46 31-1/2 10-1/4 3040K0E XL 50 31-1/2 10-1/2 3040K0G 2X 54 32-1/2 10-3/4 3040K0J 3X 58 32-1/2 11 3040K0L 4X 61 33-1/2 11-1/4 3040K0N 5X 64 33-1/2 11-1/4 3040K0Q 6X 67 34 11-1/2 3040K0S +/- 1 1 1 All measurements are in inches to the exterior of the garment.