H20 Binocular10x 42mmmodel: 150142powerful Bright Optics In A 100% Waterproof Package. Only Thing We Didn"t Do Was Teach Them To Swim. The Ultimate On-the-water Viewing Companions, Our Ever-popular H20 Binoculars Have Been Enhanced For 2012 With A Soft Texture Grip To Keep Them On Board And In Your Hands In The Most Challenging Conditions. Just As Before, They"re O-ring Sealed And Nitrogen Purged To Ensure Stunning Views No Matter How Wet They Get.to Maximize Light Transmission And Clarity, Standard Equipment Includes Multi-coated Optics And Premium Quality Bak-4 Prism Glass. From The Streamside To The Gulf Stream, The World Simply Looks Better Through The Bushnell H20general Featuresbak-4 Prisms For Bright, Clear, Crisp Viewing multi-coated Optics For Superior Light Transmission100% Waterproof: O-ring Sealed And Nitrogen Purged For Reliable, Fog-free Performance on-slip Rubber Armor Absorbs Shock While Providing A Firm Grip twist-up Eyecups large Center-focus Knob For Easy Adjustments longer Eye Relief