Mystery Ranch backpack cover, size S. The capacity is 25-45L, and it should generally cover backpacks used for day hiking. I purchased it about 5 years ago, but it has never been used and has been stored at home. Using the hook on the back prevents it from unintentionally coming off the backpack during mountain trips. I will ship it in simple packaging after purchase. --- Water-resistant black rain cover, can be stored compactly. - Brand: MYSTERY RANCH - Color: Shadow - Type: Rain cover - Storage size: Compact storage possible - Features: Uses water-resistant material Thank you for viewing.