Vortex Optics Crossfire II Roof Prism Binoculars O-ring seals prevent moisture, dust and debris from penetrating the binocular for reliable performance in all environments and argon gas purging delivers fogproof, waterproof performance. Fully multi-coated with multiple anti-reflective coatings on all air-to-glass surfaces increases light transmission. Adjustable eyecups can be twisted up or down for comfortable viewing with or without eyeglasses. VIP Unconditional Lifetime Warranty means Vortex Optics will repair or replace these binoculars at no cost to the customer, no questions asked, no registration required. Rainguard, tethered objective lens covers, comfort neck strap, and soft carry case are all included in the box.