Frame: make of imported material, better impact, heat and irritability resistant. * Lens: fitting for glasses by your real degree, better with pc or resin lens. * Mat: special, soft, elastic and anti-irritability mat maintain suitable distance from glasses to face. weaken impact and protect your eyes. * Rope: imported material with advanced technical make wearing soft and comfortable. * Bag: imported cotton material bag soft enough for clear lens, Conveniently take by close up; Case: best diving material press with high temperature.