The COS design team have created the ultimate feel and fit with this durable yet feather-light tee. It's crafted from soft 160gsm organic cotton-jersey and cut for a classic shape, making it ideal for layering or wearing solo- Regular fit, 160gsm- Ribbed round neck, short sleeves- Organic cotton is grown from non-genetically modified seeds without chemical fertilizers or pesticides100% Organic cotton / Machine washable Back length of size M is 27.55"