VIVOSUN 10 in. x 20.75 in. Durable Waterproof Seedling Heat Mat

VIVOSUN's heat-mat technology hits that sweet spot temperature around 20°C-30°C (68°F-86°F) - perfect for seed starting and cutting propagation. After covering with a humidity dome, the mat gets warm enough to create dew throughout the plastic dome, keeping your plants from drying out. Keeps a steady temperature and distributes heat evenly, even in the cold (with an insulating layer underneath).