Double anti-fog lens offer a wide and clear viewing for free underwater exploration, and smart top valves will seal the tube when diving into water so no choke and salt water any more, perfect snorkeling set for men and women. You will have a great experience with this nice diving goggles. Feature: TEMPERED GLASS LENS: Shatter resistant and scratch resistant lens to withstand deep water pressure. CLEAR & FAITHFUL IMAGE: Double coated anti-fog lens offer a wide and clear viewing for free underwater exploration. SEALING: Soft and flexible liquid gel edge skirt perfectly fit on face to prevent leakage. ADJUSTABLE: Simply pull the strap to desired fit and the buckle will secure the goggle in place. EASY BREATHING & NO CHOKE: One-way purge top valves will seal the tube automatically when diving into water, and bottom valve help to prevent water come from below, easy breathing during lap swimming. FOOD GRADE MOUTHPIECE: Easy attach to goggles, and ergonomic mouthpiece with ergonomic design for proper fit and minimize jaw fatigue. Specification: Material: Gel + Tempered Lens + PC +PVC Style: AM408 mask & 408 snorkel / AM308 mask & 308 snorkel / AM708 mask & 708 snorkel (optional) Lens frame size: AM408: 15.5 * 7cm / 6.1 * 2.7in AM308: 15.5 * 7cm / 6.1 * 2.7in AM708: 16 * 8cm / 6.2 * 3.1in Length of snorkel: AM408: 50cm / 19.6in AM308: 48cm / 18.8in AM708: 46cm / 18.1in Weight: 157-390g / 5.5-13.7oz Package weight: 165-404g / 5.8-14.2oz Package list: 1 * Diving Goggles 1 * Snorkel