Ancol Extreme Collars Ancol Extreme Collars – Inspired by mountaineering equipment, the Ancol Extreme Range features collars and hands-free leads that are ready for extreme weather conditions and wear. The nylon-web core ensures strength and durability. The soft-touch silicone coating provides all weather protection and superior stain resistance. This range is water-proof, weather-proof and wiped clean in an instant. Collars features matt-chrome fixings. This collar is available in three Hi-Vis colour options; pink, blue, and lime.