ANNEX WALLS ARE MADE OF 420D RIPSTOP POLYESTER OXFORD FABRIC, POLYURETHANE COATED FOR 2500MM WATERPROOFING; ANNEX FLOOR IS MADE OF 550GSM PVC COATED WATERPROOF FABRIC WITH HEAVY DUTY WEATHER RESISTANT ZIPPER; THE ANNEX MAY BE SET UP WITH OR WITHOUT THE FLOOR INSTALLED; ADDS OVER 42 SQUARE FEET OF DOWNSTAIRS LIVING SPACE TO THE PIKE ROOFTOP TENT; CREATES A CONVENIENT ROOM FOR CHANGING CLOTHES, REMOVING MUDDY BOOTS, STORING GEAR, COOKING OR LOUNGING, OR ADDITIONAL SLEEPING SPACE; ENTRY DOOR AND TWO LARGE WINDOWS WITH MOSQUITO NETTING AND SOLID FLAPS. A "BACK DOOR" PROVIDES ACCESS TO THE VEHICLE'S SIDE DOOR OR TRUCK BED