extra large

high performance Heat Holders® insulating yarn

Works really well with boots and great for spending time outdoors during the cold winter months

The right height for work boots and safety shoes — full coverage without bunching

All our original warmth but with a durable reinforced heel and toe

Men's ORIGINAL™ Alberto Thermal Base Layer Top alberto extra largeHeat Holders Men's ORIGINAL Base Layer Top is a heavy weight thermal base layer ideal for extreme cold. DUAL BRUSHING Supersoft HeatWeaver yarn is carefully brushed both inside and out to maximize warmth and softness. PERFECT STRETCH Our knitting technology and attention to detail produce the perfect stretch for freedom of movement and fit. FLAT COMFORT SEAMS Our carefully finished flat seams minimize bulk to create a comfortable non chafe fit,