Full Klaff is a Norwegian word that means "Jackpot". You have really hit the jackpot with this rubber boot since it is a popular all-round boot for an active lifestyle. The entire boot is handmade of natural rubber, which is elastic, resistant and waterproof. The calender outsole is non-marking. The lining is with lightweight quick drying polyester lining. The fitting is normal to slim, which means slim in the leg and in the toe area but wider in the heel cup. The boot is PVC free and vegan.