Durable blue nylon backpack cover featuring a character design. - Brand: karrimor - Color: Blue - Material: Nylon Width: 55cm Height: 80cm (Suitable for backpacks of 45L to 60L) It can be used without problems for 40L backpacks, but it might be a bit oversized. It has a fastener to prevent the cover from being easily removed. I put it on a long, thin cushion for the image. I have two covers, so I'm selling this one. Thank you for looking.