Kai Bio-Based
Kai Bio-Based
Prescription
Prescription
✓ Progressive
✓ Blue Light Blocking
✓ Photochromic Lenses
✓ Reading
✓ Color Tint
✓ Driving Lenses
Services & Guarantees
Services & Guarantees
Frame measurements
The Ray-Ban Kai Bio-Based (RB3757) is a unisex full-rim narrow oval — almost diamond-shaped — sunglass in lightweight metal. The pictured Gunmetal colorway pairs a polished silver-grey wire rim with polarized teal-grey lenses and red-brown acetate temple tips. Built on Ray-Ban's bio-based metal program. Compatible with prescription lenses, single-vision through progressive.
- Frame shape: Narrow oval (diamond contour)
- Rim style: Full-rim
- Frame material: Metal (bio-based)
- Gender: Unisex
- Size: Medium
- Measurements (56 mm / 59 mm): 56 or 59 mm lens · 34.2 or 36.1 mm height · 15 mm bridge · 145 mm temple · 127 or 133 mm total width
- Colors: Gunmetal, Gold, Silver
- Configurations: Non-prescription or Prescription, in 56 mm or 59 mm
- Lens options: Single Vision, Bifocal, Progressive
- Coating options: Blue Light, Photochromic, Anti-Reflective, Anti-Scratch
127/133mm56/59mm15mm34.2/36.1mm145mm- Frame width
- 127/133mm
- Lens width
- 56/59mm
- Lens height
- 34.2/36.1mm
- Bridge width
- 15mm
- Arm length
- 145mm
- Frame shape
- Oval
- Rim type
- Full-Rim
- Frame material
- Metal
- Frame size
- Medium
- Gender
- Unisex
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