Cotton interlock is a wonderful knit fabric. It is extremely soft and a little stretchy, perfect for under garments. It is warmer than cotton jersey or rib knit because it is a double knit construction, making it thicker and heavier than a single knit. And since it is combed ringspun, it is super soft! Made with premium fibres for a luxury feel and durability. Perfect for use throughout the year. Timeless styling with functional Y Style fly opening for added convenience whilst keeping you super comfortable and supported. Ideal for everyday wear these Y Style Briefs offer a full coverage fit providing supreme confidence for the wearer.