100% Tencel, carefully engineered to ensure unparalleled hand-feel, breathability, drape, and ease of care. Tencel is one of the most eco-friendly options available for button-down shirts and pants: it requires less energy and water to produce than cotton, it is biodegradable, and the solvents used in its production are run closed loop so there is no waste.
 

Because of my bamboo toggles, I recommend dry cleaning or hand washing, followed by hang- or lay-flat drying.