Keeps knees at operating temperature. For those who find leggings too long.85% Nylon, 15% ElastaneFeaturesHigh elasticityRugged inside for good insulation and pleasant wearing comfortQuick-dryingSilicone elastic button at thighReflectorsThermo-Inner velourHighly elastic functional materials feature excellent transverse and longitudinal elasticity, retain their shape and offer maximum freedom of movement for pleasant wearing comfort. The thermo inner velour is lightly brushed on the inside, and is thermally insulating, breathable, quick-drying, robust and easy to care for.Multi-elastic for a perfect fitBrushed, thermally insulating insideComfortable to wearBreathableQuick-drying