Using this Deuter rain cover is a breeze. Just stretch it over your 30 - 50 litre backpack, making sure it fits snugly. The luminous colors on it can be really helpful when you're out on the road or in an emergency situation. When it comes to care, after each use, simply shake off any excess water. If it gets dirty, you can gently hand - wash it with mild soap and lukewarm water. Let it air dry completely before storing it. Keep it in a cool, dry place to maintain its quality and effectiveness.