In response to the Metropolis NextGen competition call to drastically reduce energy and water consumption at an existing federal building in Los Angeles, Analogue Studio created 2ndSkin to transform the existing building envelope into an energy conserving and renewable energy generating surface, converting energy expenditure into infrastructure investment. 2ndSkin is a lightweight unitized cladding system that provides an advanced supplementary envelope for existing buildings that provides integrated energy use reduction and production capabilities through standardized modules that can be adapted to project-specific conditions. For this particular site, the 2ndSkin system combines additional insulation, air-tightness, and solar shading systems that minimize thermal losses and gains; building-integrated photovoltaic and wind systems that provide renewable energy, and light shelves that reduce demand for artificial lighting to achieve a 67% reduction in space conditioning and lighting loads.