Heat Holders® LITE™ thermal socks have been designed to provide our famous thermal protection and comfort in a medium thick profile, ideal for wearing in casual shoes and boots! The socks include a reinforced heel for heavy activity. Heat Holders® LITE™ thermal socks have a medium loop length with 1.60 Tog rating. The inside of each sock has been intensively brushed that not only feels sensationally soft but also traps warm air close to the skin keeping your feet warmer for longer. These Socks are longer length, perfect for boots that have a more casual fit or need to be more lightweight. 1 Heat Holders® Socks Long Length (measure approximately 13.2" from heel to top) LITE medium thickness profile 4 x warmer than a basic cotton sock TOG Rating = 1.6 (Thermal Overall Grade: a scientific test that measures the thermal and heat retaining capacity of fabric) Heat Holders Socks TOG Comparison: ORIGINAL= 2.3, LITE= 1.6, ULTRALITE= 1.0 Size: UK 4-8, EUR 37-42, US 5-9 Heat Holders® Patented Thermal Technology Acrylic, Polyester, Elastane