RubyLux Basic Goggles are low-cost, flexible goggles designed for use with any RubyLux brand bulb. RubyLux Basic Goggles block the overwhelming majority of infrared, UV and the brightness of visible light. (Note: the only RubyLux bulbs that emit UV light are our UV LED bulbs.) Elastic headband assures a perfect fit. Made in the USA. Package includes one pair of RubyLux Basic Goggles. HOW TO ASSEMBLE RUBYLUX BASIC GOGGLES   1. Unroll the elastic and thread each end through the circular opening on both sides of the goggles. The ends of the elastic should come out towards the front of the goggles. 2. Tie a knot at one end of the elastic. 3. Before tying a knot in the opposite side, check to make sure the elastic will fit around your head at that length. Then tie the second knot. 4. Cut off excess elastic. HOW TO USE YOUR RUBYLUX BASIC GOGGLES          1. Place the goggles over your eyes and the elastic band around your head. 2. The goggles should fit snugly, so no light can leak around the edges. 3. Wear your RubyLux Basic Goggles whenever you are using any RubyLux brand bulb. SAFETY INFORMATION 1. Wear your RubyLux Basic Goggles each time you use a RubyLux bulb. 2. RubyLux Basic Goggles should not be worn if they are broken, cracked or any piece is missing. 3. If elastic band wears out, it should be replaced to ensure proper fit.