Vendor Information: Invisible Structures Inc. provides the finest environmentally friendly products for site development. Our products can help you ease costs control stormwater and add aesthetic value. Our flexible porous (permeable) pavers Grasspave2 and Gravelpave2 can be used in fire lanes green parking lots grass or gravel driveways ADA and heavy truck access roads and pedestrian and multi-use trails. Our underground stormwater storage system Rainstore3 is possible the most flexible to design and most versatile to use retention detention or harvesting (gray water for reuse) system. Slopetame2 is unique in the erosion and sediment control market integrated rings bars grid and fabric give the best immediate and long term protection for the price. Draincore2 geosynthetic drainage layer provides unprecedented water conveyance and air infiltration while maintaining strength perfect for green- roofs athletic field drainage french drains planters and retaining wall drainage.