Snypex's black 10x42 Infinio Focus-Free Binocular features a focus-free design that gets you viewing faster without wasting precious time trying to find and manipulate a focus wheel. Anti-reflection fully multi-coated optics reduce light loss and maximize the amount of light that reaches your eyes. Designed for long-term comfortable use, the housing is made of a lightweight and durable fiberglass-reinforced polycarbonate housing with an open-bridge design to further reduce the weight, while providing a large holding surface. The housing's exterior is covered with a rubber armor that protects the binocular from impacts and provides a secure non-slip grip. Twist-up eyecups allow you to customize the eye relief and can be used with or without eye wear.