The KPC4 model is a double layer, Kevlar constructed Pitot cover designed to provide extreme protection and take heavy abuse in applications such as commercial and military operations. The KPC4 has an open-mouth design allowing for easier pole installation. The KPC4 is a non-melting cover, and it has Sesame's proprietary waterproofing lamina installed. The lamina acts as a one-way gate for water and moisture; allowing condensation or moisture to escape but will not allow water to enter the cover from the outside.