Description:The cover provides reliable protection from rain, protecting the backpack from scratches, dirt, sand. The outer layer adopts wear-resistant Nylon to avoid scratch and dirt. The inner layer adopts waterproof coating to avoid rain and snow. To fit the lid to the backpack. It will make the lid stick to the backpack to avoid falling. It can be easily folded so you can put it in the side bag of your backpack to save space. Elastic rain cover, hot stamping reflective strip, suitable for outdoor activities and perfect for outdoor travel, riding, climbing, hiking and so on. Specification:Material: Nylon (190T Silver Coated)Size Chart:35L: 55x4 0cm/21.65x15.75 inch,45L: 60x4 4cm/23.62x17.32inch,60L: 67x4 7cm/26.38x18.5inch,70L: 80x5 3cm/31.5x20.87inch,80L: 85x6 0cm/33.46x23.62inch. Package Included:1 Piece Reflective Backpack Rain Cover. Note:The color may vary slightly due to the color calibration of each monitor. Please allow slight measurement deviation due to manual measurement.