Lid Snake ANVIS The Spiritus Systems Lid Snake was designed for anybody using night vision devices that require a battery pack and safe, quick, donning and doffing. The wires connecting your battery pack are delicate and can easily become damaged or disconnected from your helmet. The are two traditional approaches to mitigate this problem. 1) Run tape along the entire length of your cable to secure it to your helmet. The problem with this is that you cannot easily remove your batter pack from your helmet for airborne operations or maintenance. 2) Run the cable underneath your helmet between your pads. This option allows your battery pack to be removed quickly but creat Mfg: Spiritus Systems