Pentax 10x36 DCF HS Binocular (Black) Fiber reinforced polycarbonate design make these binoculars extremely lightweight and durable High-resolution phase-coated and super-reflective coated roof prisms provide high resolution, high contrast images Fully multi-coated lenses increase light transmission and color quality Long eye-relief for viewing with or without glasses Water resistant (JIS Class 4) design for use in inclimate weather conditions