'XXL' 12 Gallon Grow Sleeves - 100 PackThe XXL Standard Sleeve holds 12 Gallons of Growing Media Double the size of the Original Grow Sleeve! Octopot's Grow Sleeve aerates growing media and promotes root pruning, just like an air pruning or root pruning pot. Aeration builds root mass for faster growing and healthier plants. Octopot's aerated environment promotes evaporative cooling keeping plant roots cool. Reusable Hand Wash and Hang Dry Made from Breathable Non Woven Needle Punched