MUJI (Mujirushi Ryohin) Warm Cotton Crew Neck Short Sleeve T-Shirt, Kids 80, 2 pieces, Organic Cotton Baby, Off-White White This t-shirt is made with cotton that absorbs moisture and sweat from the body and generates heat. The cotton is organic cotton. Compared to the 2022 model, it has been improved to be more resistant to wrinkling after washing. Purchased in the winter of 2024. No smokers or pets.