The Adventurer Series Binoculars deliver outstanding resolution, extreme ruggedness, and excellent value. Starting with fully multi-coated precision-matched HD lenses, non-slip rubber armor-coated magnesium chassis, and BAK4 phase-corrected roof prism are features all three models share. Made to function in real-world conditions these rigged, light-weight binoculars are nitrogen filled, O-ring sealed, and the Watershed lens coatings disperse moisture. The clariy and resolution will rival our competitors at more than twice the price, that is value delivered! No receipt, no warranty card, no problem. Adventurer Binoculars are covered by our Transferable "Sting Free" Lifetime Warranty.