Rugged, durable, and rigid. The Boulder 100 Briefcase Solar Panel is built with strong tempered glass and an aluminum frame with added corner protection for temporary or permanent installation. Composed of two Boulder 50 Solar Panels (100 watts total) chained together and connected by a hinge. Equipped with an integrated kickstand to help get optimal angle to the sun. Included is a protective canvas bag for easy carrying. Use with a Goal Zero portable power pack or portable power station to charge your gear day or night.