Phat Sacks environmentally friendly fabric grow pots are the preferred container of professional growers for their superior aeration and drainage qualities. The breathable felt construction also reduces heat buildup in the grow medium and encourages air-pruning, an effect created when roots come into contact with air. The air-pruning effect prevents root binding and stimulates branching/development of a finer root mass, which translates to higher yields. Better roots mean bigger fruits! Phat Sacks also feature easy-lift-and-carry integrated handles.Phat Sacks are proven to encourage better growth and yields than typical plastic containers! We highly recommend giving Phat Sacks a try, even if only for one plant in your grow. The advantage will be obvious!