EnerPlex Packr Executive Solar Powered Backpack (PREXECGY) SOLAR INTEGRATED: The perfect blend of size & power, the 3 watt integrated solar panel will charge your favorite smartphones, cameras and more in less than 5 hours. LIGHTWEIGHT: Solar-on-plastic technology makes the unit extremely light & flexible, adding virtually no weight to the backpack. RUGGED: The integrated solar panel is water resistant & designed for the harshest conditions. Can withstand shocks, drops and minor punctures. FEATURE-RICH: This backpack includes all of your favorite backpack amenities including padded laptop sleeves, expandable compartments, pen and business card pockets, and more. MADE IN THE USA: Leading, American manufactured solar technology you can trust. The solar panels are engineered and 100% made in Denver, CO and AWARD WINNING: Built with the World's Most Awarded Solar, one of TIME Magazine's Top 50 Inventions.