EX Marks and Spencer Elasticated High-waisted Leggings. Charcoal Mix 61% Viscose, 26% Polyamide, 10% Polyester, 3% Elastane. Navy Mix 51% Viscose, 31% Polyamide, 15% Polyester, 3% Elastane. Black, Navy - 70% Viscose, 26% Polyamide, 4% Elastane.