The Coverking Coverbond 4 is an advanced 4 layer material which is breathable yet weather resistant. The thickness from the 4 layers does a great job of protecting from minor nicks, dings, and light hail damage. Added UV inhibitors help to prevent UV damage. Similar to the Triguard the Coverbond 4 has an extra middle meltblown layer. This middle layer gives the Coverbond 4 added strength and bulk. The added layer improves water resistance while keeping breathability quite high. However, because of the added bulk, Coverbond 4 is suggested for people who can handle heavier cover.