This is a button-down shirt from MUJI that my family bought a few years ago. It has been stored since it was purchased. It's a "Shape Retention Broadcloth Button-Down Shirt," and the "regular" indicates it's a basic design. Made of 100% cotton, using 60% organic cotton. Color: White系 (White-based) Pattern: Solid Collar Design: Button-down (BD) Stains, tears, odors, etc.: None