Plenty Package: Includes 4 universal RX goggle inserts that allow you to convert most standard goggles to prescription use in seconds. The quantity provided supports daily use, replacements, and sharing with family or friends. Quality Materials: These snowboard goggle RX insert optical adapters are made from TR90 material, known for being flexible, durable, and lightweight. The ski goggle adapters fit securely into most adult-sized ski goggles using a sub-frame with four arms that hold the insert firmly in place. Stabilize Your Glasses: Eliminate the need for over-the-glasses (OTG) style goggles and reduce the risk of damaging your everyday eyewear. These ski and snowboard goggle insert adapters help stabilize your glasses, prevent sliding, maintain clear vision, and can be easily transferred between goggles. Widely Applicable: These universal inserts are compatible with a wide range of goggle models, including ski, motorcycle, and tactical goggles. Designed for simple and convenient use. Practical Gifts to Share: With thoughtful design and easy installation, these inserts make practical gifts for friends, colleagues, classmates, parents, relatives, or anyone who enjoys skiing or winter sports.