Reliable Results: The VIVOSUN professional heat mat maintains sweet-spot temperatures around 68-86℉(20-30℃), which is perfect for start seeding and cutting propagation; Made of high-quality PVC material, it is wear-resistant and durable to useStable & Uniform Heat: The advanced far-infrared heating technology of this heat pad provides your plant with a warm environment to create optimal conditions for speeding up germination and accelerating the growth rate; The strengthened heating film with double insulation layers ensures this durable mat will not scorch the root and can produce plenty of invigorating dew when being used in combination with a humidity domeBuilt to Last: Designed with soft, flexible, and ultra-lasting material, this warming mat goes beyond stringent MET standards; The IP67 rating waterproof surface is easy to clean that enables safe scrubbing; Note: please only use the product indoors and do not immerse it in the water; Equipped with a carrying bag in the package, you can simply roll it up and pack it away, which is handy to move to different places; This product does not specify any expiration dateBest Savings in the Market: This warming mat also runs on only 20 Watts to help you save on electricity; Combined with VIVOSUN thermostat, it can not only use for plant sprouting and other indoor gardening but also for home brewing and terrarium warming, meeting your different daily needsInnovative Heating: With the radiate far-infrared light wave, this seeding heat mat makes the heat source softer and provides enough heat, which can be heated up to 40 ℃（104℉）at an ambient temperature of 20-25 ℃（68-77℉）in minutes; We recommend using it with the VIVOSUN thermostat controller and humidity dome Product Description 1 Multi-Layer Construction 2 IP67 Waterproof Surface 3 Built to Last RECOMMENDED PRODUCT Size 48x20.75 Inch 20x20.75 Inch 10x20.75 Inch 3x20.75 Inch 10x20.75 Inch 20x20.75 Inch Function Keep sweet-spot temperature Keep sweet-spot temperature Keep sweet-spot temperature Keep sweet-spot temperature Keep sweet-spot temperature Keep sweet-spot temperature Advantages Supple, flexible and durable Supple, flexible and durable Supple, flexible and durable Supple, flexible and durable Supple, flexible and durable Supple, flexible and durable With thermostat No No No No Applications Seedling, Terrarium Warming Seedling, Terrarium Warming Seedling, Terrarium Warming Seedling, Terrarium Warming Seedling, Terrarium Warming Seedling, Terrarium Warming