Multi-functional features: our camping tents include military grade ykk zippers that provide enhanced product life and enhanced durability. The door and windows come equipped with a pvc dipped mesh which is robust and does not tear easily. The doors have an additional buckle fastening system (both inside and outside) with an additional flap across the door panels for extra protection to keep the tent dry during heavy rain and strong winds and an extra 16 sun/weather eave shade. Interior features: our 4 season camping tents are spacious enough to accommodate large group of people, families and friends making them ideal tents for camping. Durable 3-layer large triangular distinctive windows come with clear polyvinyl flap with a durable velcro fastening system for letting in natural light without losing the heat from your stove, better ventilation and clear views. All the seams are double stitched, corners are reinforced for added strength.