Using your Trekmates Mesh Stuff Sack is easy. Just open the one-touch free - flow drawstring closure and put your clothing, laundry, or accessories inside. Then, pull the drawstring to close it up. When choosing a size, think about how much stuff you want to store. For maintenance, you can hand - wash it with mild detergent and let it air dry. Avoid using harsh chemicals or machine - drying as this may damage the 30D Sil/PU Nylon material. To keep it organized, use the colored base and drawstring to quickly find the sack you need. Also, don't overfill it to ensure the drawstring closure works properly.