100% Polyester Made in USA The open back makes the size very flexible. You can wear it tucked in and fold the back tight so that it's tighter-fitting, or wear it as loose as you like! Great condition Pit to Pit is 19 inches but both expandable or contractable due to open back being adjustable. 25 inch length from shoulders down. Let me know if you have questions! Clover Canyon's owner is very pro-sustainability and everything she designed was vegan. She closed shop to pursue other ventures, sadly for us!