MINERVA Air Mesh Panel Size: XL This is a mesh net to be attached to a backpack. It creates space between the pack and your back, preventing stuffiness and increasing cushioning. Easy to attach, just add the mesh panel. Used a few times, and washed. Please refer to the size chart in the images for product size details. For those who understand that this is a used item, thank you. *L size of the same product is also available. Other backpacks, etc. are also on sale. Multiple purchases are eligible for a discount. Please let me know before proceeding with the purchase. *This item is also listed on other sites, so it may be removed from sale suddenly. Please check for stock availability.