The fabric used has been tested as having a 50+ UPF rating: this means it blocks out 98% of the sun's harmful UVA and UVB ultraviolet rays

34 TOG) in a proper extra-large size — not a regular sock stretched to fit

34 TOG) in a construction designed for long shifts

a lightweight synthetic fill works in harmony with our luxuriously soft HeatWeaver® lining to provide incredible insulation

The Women's Petunia Stripe Crew Slipper Sock features the same warmth and comfort as the Heat Holders® ORIGINAL™ Crew sock

Men's Phillip ULTRA LITE™ Multi Stripe Crew Socks Raynauds The fabric used has beenSize: Men's 7 12 Also fits: Women's 8 13 Men requiring size 4 8 can look at Women's styles. Heat Holders ULTRA LITE thermal socks have been designed to provide our famous thermal protection and comfort in a lightweight profile, ideal for wearing in tighter fitting shoes! Compared to our LITE, medium long loop length thermal socks with 1. 60 Tog rating (Thermal Overall Grade), Heat Holders ULTRA LITE thermal socks have a short loop length with 1. 04