Ultra-lightweight pack cover with excellent durability and water resistance. Designed to cover the entire upper back. Even if water gets in, the drain system at the bottom efficiently drains it. Comes with a stuff sack. 【Material】40-denier nylon ripstop, back side: Hydro Pro 【Color】Blue 【Compatible Pack Size】15 - 20L Used only once. It has been stored since then, so there are some fold creases. Please understand this before purchasing. To reduce thickness, it will be unfolded and folded for shipping via Nekopos (a Japanese delivery service).