The additional Savanna 4 Flexi Wall adds privacy and protection against sun, wind, and rain. It zips into the Savanna 4 Deluxe Shelter (sold separately) and can be rolled back to the center to create a door. Made from 150D silver-coated polyester with a 4000mm double-coated waterproofing, it’s fire retardant and features an SPF50 UV coating.