Black Organic Cotton Crewneck Sweatshirt. GOTS Certified. Organic Cotton is a Mid-weight, stretchy fabric. 100% Organic Cotton. Backed with soft fleece for warmth. Arithmetic logo embroidery through front. Ribbed hem and cuffs. Slips on. Cut for a slightly loose fit. Machine wash 30°C. Model is 180cm and is wearing a size M. Please contact us if you can't find your size.