The FtZGZ Men's Milk Silk Christmas Pajamas Set in size M features a graphic print pattern with a festive Christmas theme, perfect for the winter and fall seasons. This pajama set includes a long sleeve top with a boat neckline and is made from a lightweight and comfortable silk and spandex blend fabric. The red color adds a touch of holiday cheer, making it a great choice for a cozy and stylish night's sleep during the festive season. Made in China, this machine washable pajama set is designed for men who appreciate a high-quality and attractive sleepwear option.

Tag says L, but  it is Asian Fit so is more like M 

95% Milk Silk 5% Spandex