PowerFilm Foldable Solar Chargers are extremely lightweight and compact, with the largest charger easily stored in a backpack or laptop bag, and the 5W charger fitting in a cargo pocket. The chargers are designed for durability, and are UV and weather resistant to handle diverse environments. They range in size from 5W to 60W, and custom sizes are available. Unlike other portable solar chargers, PowerFilm chargers can be used immediately after being removed from their packaging.