This Flo-n-Gro 724975 3-gallon fabric liner is constructed to fit snugly into Flo-n-Gro 360-degree plastic mesh inserts. Its breathable fabric provides adequate drainage and aeration while promoting lateral root development and vigorous plant growth. It also eliminates circling and misguided roots. An ideal year-round option, the Flo-n-Gro keeps substrate warmer during cold temperatures and reduces substrate temperatures during high temperatures. Note: Secondary image shows fabric liner inserted into plastic mesh frame. The plastic mesh frame is sold separately.