The sides can be fully opened, making it easy to put on and take off even while wearing mountaineering boots. The zipper can only be opened from the bottom. Product Information Size Chart https://www.montbell.com/jp/ja/products/detail/1128652 Purchased several years ago, used a few times. There are scratches and stains. Please make your judgment based on the photos. Everything in the photos is included. No claims and no returns accepted. Please refrain from purchasing if you are concerned about minor details or do not understand the nature of used items.