For an in-depth understanding and what to look for in ballistic goggles, you can refer to -

Erne Ballistic Sunglasses - Olive Green

Erne ballistic sunglasses with distortion-free military-grade polycarbonate lens which gives a wide field of view. Made of polycarbonate frame and lens with anti-scratch, anti-fog, and UV 400 protection features.

• Protects your eyes from shrapnels
• Features a low profile temple arms
• Lightweight and comfortable to wear under the ear hearing protection, communication devices, hats, and helmets
• Fits any face shape or size
• Frame Material: Polycarbonate
• Lens Material: Distortion-free military-grade polycarbonate
• Lens Properties: 1.7 mm thick, anti-scratch, anti-fog, and UV 400 protection
• Designed to combat fogging on the inside and scratches on the outside
• Size: One size fits all
• Frame color: Olive Green
• Lens colors: Smoke
• Comes in a zippered hard case with a cleaning cloth and soft bag

Ballistic protection tested using a 12 bore shotgun @15 feet distance using shot size #6 cartridge.