The Parcours Iso have 4.5mm of Neoprene lining inside, plus 6mm of insulating felt on the insole. Neoprene is the best insulating material known of today, and is commonly used in diving suits.
Fitted ankle means walking boot comfort can be expected from these rubber boots, with support where it is needed most. Now with added anti-fatigue technology incorporated into the sole unit and a better grip pattern on the outsole.
Another feature of the Parcours Iso boots is the zipped closure with waterproof gusset.