Silva Epic Binoculars 8 x 25 Silva Binoculars top spec model with a nitrogenfilled optical system. High quality lenses provides an excellent image. The Silva Epic Binocular has a solid rubber coated and waterproof design, these compact binoculars are perfect for hiking, sports and outdoor use. The roof prism design featuring Bak4 optics provides excellent optical performance. Waterproof, nitrogen gas filled, and thus also completely moisture and dust proof makes this a reliable partner in the toughest of conditions.