B Young Coated Stretch Jeans Black. As seen on ITV Lorraine. Stylist Mark Heyes says, “They’re so stretchy you could do lunges in them.” Gorgeous coated leather-look jeans by B Young. Skinny fit with regular waist – they look amazing paired with both trainers, for a day-time look, and heels/boots for a chic evening outfit. Composition: 75% Viscose,21% Polyamide,4% Elastane.