The additional Savanna 3.5 Flexi Wall adds privacy and protection against sun, wind, and rain. It zips into the Savanna 3.5 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.