Goodluck rain cover is primarily designed for protect backpack and its content from getting wet in the rain. It is most useful when you are on a bike and caught off-guard by the sudden downpour or to cover bigger school bags or laptop bags in the rain. Made of Polyester material, this backpack rain cover ensures your stuff doesn't get drenched on outdoor activities like camping, hiking, trekking and protect your bag from getting wet when it starts to pour. Now you don't have to wait any longer for that perfect weather to step out. The cover is fully seam taped.hip belt loops hold the cover securely in place. Suitable for 25 L Backpack This bag cover perfectly fits around a 25 L backpack and completely protects it from the rain.