The Flexi Mesh Wall with windows zips into the Savanna 4 Deluxe Shelter (sold separately). It features a roll-back center door and window covers that can be rolled back to allow airflow through the ‘no-see-um’ mesh windows. Made from 150D silver-coated polyester with a 4000mm double-coated waterproofing, it’s fire-retardant and has SPF50 UV coating for added protection.