The internal material was improved with a high-reflective, silver mylar-foil, which guarantees optimal reflection and your plants can flourish. This is only one out of many advantages of this growbox. Especially the price, as well as the general high-quality manufacture are convincing. To the additional quality features belongs the light- and airproof external material, where the focus lies in the robustness of the material. The lightproof zippers are hard-wearing and also robustly processed.