Worn a few times, washed carefully, and stored in a dark place. The fabric is sturdy, and undergarments won't show through at all. Also, the size is relaxed, so you can wear it for a long time, in fall, winter, and spring. Please purchase only if you understand that this is a personal item. MUJI Border Boat Neck Cut and Sewn Top, 3/4 Sleeves Size M-L 100% Cotton Pattern: Border Season: Spring, Autumn, Winter Color: Black系 (Black-based) Color: White系 (White-based) Neck: Boat Neck