Product DescriptionSPEYLINE 4.0™ a traditional boot, designed with comfort and stability at the forefront. Classic bellows - gives great calf fit. 3MM INSUFOAM-ULTRA(tm) NEOPRENE LINIG - Gives the wearer added comfort and warmth 6mm NITROCELL™ footbed - provides a soft cushioning for an athletic shoe feel.  The NITROCELL™ footbed has a million microscopic nitrogen bubbles that insulate the wearer from cold surfaces, no need for special ‘Welly Socks’ that roll down and rub. VIBRAM® BRISTOL™ sole-  features ENCAPSULATED FOAM™ technology in the heel absorbs heel strike shock for day long comfort. SUPERDRI™ lining - wicks moister away from the wearers foot to prevent a sweaty and uncomfortable feel, it is fungus and rot proof so will not smell like cotton lined boots. COMFORT RATING - -20ºc to +20ºc. Grubs Speyline Wellington Boots Mahogany