Product Description Zeal's largest Rail Lock System goggle that provides explosive color, clarity, and contrast. Portal XL's field of vision spans the widest of ranges, and features a spherical polycarbonate lens that curves both vertically and horizontally to enhance peripheral vison. Increased lens volume creates less distortion and helps reduce glare and fogging. OTG ready, these over-the-glass goggles can be worn with or without glasses.