Octave Ladies Black Thermal Leggings - Softly Brushed Inside For Extra Warmth OCTAVE Ladies Black Thermal Leggings ? Softly Brushed Inside For Extra Warmth These premium quality 140 Denier thermal leggings are your essential winter leggings as they provide more heat insulation than you average cotton leggings. Fibre content: 90% Polyester & 10% Elastane Their unique construction and specially developed fibres make them not only super warm but also super cozy. The soft brushing inside maximizes the amount of warm air held close to the skin These thermal leggings have a high TOG rating of 0.5. TOG rating is a recognized measure of a textile?s thermal ability The excellent thermal qualities incorporated provide a high performance insulation against the cold so you can stay warm while the temperature outside falls