Ludvig Svensson's OLS White external shade is the perfect choice for protection against greenhouse overheating. It is an affordable way to shade for cooling. OLS White is made with highly reflective white films rather than aluminum foils. OLS White does not retain heat during the night, but provides daytime shade to cool greenhouse temperatures. It has an open structure that allows air and moisture to easily pass through. Evaporation and transpiration are slowed, reducing heat gain and conserving water. Built to last, OLS White is durable and can be manufactured in 30-, 40- or 50-percent shading. The flexible shade can be installed in a suspended retractable roof, rolled up over a hoop style house or permanently attached to the roof.