They are typical low-cost Chinese manufactured roof prism binoculars. They can be had for $160 which in my opinion is well below what I consider acceptable for a roof prism binoculars, especially that they are not phase corrected. For that price you will get a much better view with porros like the Nikon Action Extreme or Pentax PCF WP II. The cheapest roof prism I find acceptable is the $185 Olympus Magellan EXWP I. I looked through the Simmons and chuckled, quickly placing them back in the rack. Look elsewhere.