This is a summer underwear set made of 50% linen and 50% cotton. It adds absorbency, a gentle texture, and a refreshing feel. Comfortable underwear for summer! The fabric is functional and highly elastic. Includes a short-sleeved U-neck shirt and long pants. How about getting prepared for the coming season? Also great as loungewear or pajamas in the middle of summer ^ ^ After washing, gently pull the fabric lengthwise and widthwise to shape it before drying.