Slip your Vortex Optics Viper 10x42 HD Binoculars into the included chest harness to keep your hands free so that you can scramble, hike, and climb to your desired destination. Once you get the high ground you are looking for, whip the Vipers back out and use the 10x zoom and 341 feet of linear view to pick out land marks and find that awesome fishing spot or perfect camping location for the night. For maximum comfort and usability, these binoculars feature adjustable eye cups for clear vision with or without eye glasses on your face. To keep your vision clear in inclement weather these lenses are gas purged to prevent fogging and waterproof to prevent damage to the internal elements.