This 7-gallon aeration liner is constructed from high quality non-woven fabric. The 724887 RediRoot aeration liner provides great support, while allowing air to travel into the root system. This RediRoot liner has sturdy handles, making lifting and transporting a breeze. Using this RediRoot liner with a RediRoot frame supplies added oxygen to the root zone, while maintaining proper support for your plant. This unique design allows you to move your plants without the damage that occurs with standard grow bags.