Designed to be stacked and stored for easy access to microgreens. * Light-resistant material blocks out light to promote uniform growth and prevent algae or mold from forming. * Helps maintain correct temperature and moisture levels for optimal microgreens growth. * Durable and made from high-quality materials for long-term use. * Protects microgreens during transportation and storage without blocking airflow or light completely. * Compatible with most microgreens jar and can be used with any microgreens variety to ensure healthy and uniformed growth. By using microgreens blackout sleeves, you can easily and efficiently grow microgreens in a compact space. These features make microgreens blackout sleeves ideal for microgreens growing operations, large or small. What is the Purpose of the Blackout Period when spraying seeds? The blackout period mimics placing soil over the top of your microgreen seeds as you'd typically do when planting in an outside garden. There are several reasons soil (this includes soilless potting mixes) isn't used to cover microgreen seeds. Made from Premium Neoprene Sheet ● Elastic ● Reusable ● Washable ● Light- Resistant