The exped zip seal waterproof 55 inch phone and map case is flexible and versatile enough to be used to protect a large screen mobile phone mp3 player handheld gps unit or other electronic device or paper based items such as maps and all sorts of documents such as travel tickets passes identity card and passportthis case is a 100 waterproof lightweight tpu polyether envelope with a zip that seals the contents inside and keeps rain snow fog and contaminants such as dust and sand on the outside