Optic Nerve Boiler Sunglasses Backpacking Packs The single-unit insert fits easily

The single-unit insert fits easily into three unit and four unit frames and features a small notch for quick removal

Light cushioning along the entire bottom of the foot offers a snug fit in your favorite low-cut hiking shoes

•Hydration system compatible

Compatible with: 1L Short & 1

Optic Nerve Boiler Sunglasses Backpacking Packs The single-unit insert fits easilyWith its bold red lens and trendy sport like frame, the Boiler is hot, hot, HOT! These shades are super lightweight and perfect for any adventure that may lay ahead. Fans of the Mashup and Ziggy will rejoice this is the newest go to! Check Out our newest frame color, crystal! Unisex, fits a wide range of face sizes. UV Rating: 100% UVA UVB Protection Lens Type: Polarized Design: Active Sports Warranty: Lifetime Frame: Durable, Lightweight