Nash Titan Bivvy GroundsheetNash Titan Bivvy Pro Groundsheet Extra tough groundsheets with pegging rings that serve two purposes for Titan Pro and Camo Pro users. The additional HD groundsheet can be positioned underneath the integral inner mesh capsule PVC base to protect against gravel banks and prevent damage, and prevents packing away an inner capsule with a wet base. Alternatively the additional groundsheet can be used for sessions where the inner mesh capsule isnt