Black Organic Cotton Long Blouse. GOTS Certified. Organic Cotton is a Light-weight, stretchy fabric. 100% Organic Cotton. Arithmetic logo embroidery at side. Can be worn as a dress. Slips on. Fits true to size. This T-shirt is designed for a regular cut. Machine wash 30°C. Model is 180cm and is wearing a size M. Please contact us if you can't find your size.