Thank you very much for viewing. This product is 70L. You can buy it immediately. No need to check stock. ■ Material: Nylon + Waterproofing Product Information: This cover completely wraps your backpack, protecting it from rain and snow. Reflective material for safety at night! It reflects well in the dark, making you visible to cars and bicycles. Simple structure for easy use - just put it on. Thin and lightweight nylon fabric! It can be stored compactly and is convenient to carry. If you take this cover with you on hikes or mountain climbs, you'll be prepared for unexpected rain!