Stay Warm Thermal Brushed Leggings

This winter-wear pair of leggings comes with a brushed inner lining and a high waistband for abs support. Wear it by itself or underneath your slacks

Cette Opaque THERMAL TIGHTS 300 DEN with Warm Fleece Inner (Hoseiree.com)

I tried B&M's cheap thermals and they rival M&S for keeping warm - Manchester Evening News

Coated Thermal Skinny Leggings with Lacing - Calzedonia