Come on, let's celebrate! The fabric is 100% COTTON. This differs from previous button ups which were made with polyester. Please check the last image for sizing! Please check the last two images for sizing. There is one size chart for inches and one size chart for centimeters. HOW TO MEASURE: The size chart reflects the garment measurements, NOT your body measurements. The most accurate way to find your size is to measure an existing shirt that fits you well (lay it flat and multiply the chest width by 2 to compare it to this size chart). If you have your body measurements only, you will need to add a few inches/cm to account for flexibility and movement!  Color of the actual product may vary slightly from it how looks on-screen. Please note that apparel items cannot be returned or exchanged.