Pro Swole designs and manufactures athletic apparel overseas, so our sizes are a bit on the small side.
As a rule of thumb for ordering, we recommend going one size up from what you're used to buying (so if you're a Medium in Under Armour, we recommend going at for at least a Large).
Our compression products are made with a proprietary blend of polyester (95%) and spandex or lycra (5%). They're designed to have a "second skin" feel -- almost like they're hugging your muscles.
We recommend consulting the below sizing charts before ordering.
Men - (inches)
Men - (cm)
Women - (inches)
Women - (cm)