Root Riot Refill BagA bag of 50 loose fleximix rooting plugs a very effective type of rooting plug that holds the perfect air to water ratio. Ideal for rooting cuttings and starting seeds. Made from natural and biodegradable ingredients. How Root It Fleximix Plugs Work Root It fleximix plugs are made from natural substances bound together with polymers made from plant extracts. The result is a biodegradable sponge that holds a lot of water without becoming waterlogged,