Our Light-Booster Coldframe is ideal for growing a wide variety of plants in pots and seed trays. The reflective backing bounces light back onto the plants increasing light levels by up to 70%! This boosts growing healthier and more robust vegetables herbs fruit and flowers. The 2 full height zippers allow the front panel to be rolled up providing easier access to the plants inside. The side vents are covered in micromesh which prevents the Plant House and your plants from overheating. The Coldframe prevents plants from being exposed to frost and harsh weather. Product: 39.5″W x 19.5″H x 19.5″D 4lb. Pack: 8″W x 38.5″H x 2″D. Pack Size: 1.