Ear protection is critical, but it does not need to be bulky. The i4 system features a compression formed earpiece that is soft, flexible and extremely lightweight. Cool Max material in the ear protection has also been added to increase moisture evaporation. * Tiger Teeth buckles allow you to adjust your Invision woven rubber strap for a custom ft. Tiger teeth are designed to bite down and secure the strap during rigorous competition. * The i4 features an industry first compound radius lens with thermal technology, giving the player the ultimate vertical/horizontal peripheral vision. Dye thermal lenses provide the benchmark for anti-fog performance. All Invision lenses provide perfect optical clarity and set the standard for visual performance. * Using patented technology the i4"s precise blade angling and proven venting confguration, heat and moisture dissipates quickly. Scream Multi-Directional Venting makes communication with teammates effortlessly by carrying your voice farther. * The i4 has a revolutionary patent pending rapid lens change system, allowing lens changes in ten seconds or less. It is as simple as pushing on each interior tab arm, then slide them forward and the lens is free to be removed.