Shelter Systems - Phone: 866-777-1066 (Orders & Customer Service). Mail: 224 Walnut St., Menlo Park CA 94025. Shelter Systems is an independently owned business dedicated to creating environmentally sound, low impact, portable shelters tents and greenhouses. We manufacture a wide range of Tensegrity and Geodesic structures. Our portable shelters have protected people around the world for over 30 years by providing shelter in all types of conditions. Our greenhouse line has resulted from the blending of business with lifestyle.