Using your Herschel Black 20L Survey™ Backpack is easy. First, adjust the shoulder straps to fit your body comfortably. You can use the snapdown extension when you need more space for your belongings. Put your laptop in the dedicated 15 - 16 inch sleeve to keep it safe. Use the side storage sleeve for things like your keys or wallet for quick access. The water bottle pocket is perfect for keeping your drink handy. When it comes to maintenance, spot clean the backpack with a mild detergent and a soft cloth. Avoid machine washing as it may damage the EcoSystems™ Fabric. Also, don't overstuff the backpack to prevent it from losing its shape. And make sure to keep it away from sharp objects to avoid tears.