100% organic cotton. Relaxed fit. True to size/generous. This is a new style and fabric, so if you've had Pikolo before this will be different. You may have had to size up previously, but you shouldn't need to this time. Very comparable with scandi sizes. Wash care: Cool, gentle washes are recommended with similar colours. Wash at 30. No tumble dry. No bleach. Dry on the line.