100% Genuine
Skip to product information
1 of 26

Ray-Ban - RB3757 - Kai - Sunglasses

Ray-Ban

Regular price £89.99
Regular price £149.99 Sale price £89.99
Save £60.00
Hot Deal Sold out
Taxes included. Shipping calculated at checkout.

VAT & Shipping Included in Deal Price

Colour
Lens Width
Lens width diagram
Lens Size:
56 MM
Bridge size diagram
Bridge Size:
15 MM
Temple length diagram
Temple length:
145 MM
Quantity

Ray-Ban - RB3757 - Kai - Sunglasses (Ray-Ban) is selling:
Fast! Last few pairs left of these 100% original designer eyewear. Buy Now Before the Deal Ends Forever!

Proudly British: Authentic eyewear, fast UK delivery, easy returns. Shop with confidence!

  • Free Delivery (Save £8)
  • 14 Days Return
  • 2 Year Warranty
Stock Level: Only a few left!
Select Lens and Purchase

Frames ship with the standard non-prescription lenses shown in the images. No lens coatings or vision correction included — choose Add Prescription Lenses above to upgrade.

Out of stock — get an email when it's back

100% Authentic Direct from authorized distributors
94% Ship in 24h Guaranteed delivery in 5–8 business days
14-Day Returns Hassle-free, even with prescription lenses
Real Humans 24/7 email and live chat support
  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Maestro
  • Mastercard
  • PayPal
  • Shop Pay
  • Union Pay
  • Visa

Description

Introducing the Ray-Ban RB3757 Kai, a refined expression of urban luxury. This unisex sunglasses silhouette fuses a slender metal full-frame with an oval profile, offering timeless appeal that suits every day and occasion. With adjustable nosepads for a personalised fit, and two width options (56mm and 59mm), RB3757 Kai is designed to flatter a range of face shapes while preserving comfort for all-day wear. Each pair arrives authentic and ready to wear with its official Ray-Ban packaging.

Crafted with a metal front and metal temples, the Kai frame delivers a light, durable feel with lasting polish. The lenses are fashioned from Polyamide Bio, a modern, high-performance material chosen for clarity and resilience. The combination creates a sleek, low-profile silhouette that remains comfortable during long days in the city or by the coast. The base 2 curvature adds a subtle lift to the optical profile, while the articulated temples and precisely engineered hinges support easy, secure wear. The precise bridge size of 15 mm and temple length of 145 mm contribute to a balanced, secure fit.

RB3757 Kai is offered in a refined palette across several finishes. Choose from Gunmetal, Pale Gold, or Silver for a classic metallic sheen, or opt for Gunmetal (004/2V) – Azure Polarized for a bold, modern look. Pale Gold (921387) with Dark Grey lenses and Pale Gold (9213/2) with Green lenses provide contemporary contrasts. Available widths include a 56mm lens and a larger 59mm option to suit preference and proportion.

As an official stockist of premier brands, Ardor Eyewear guarantees authenticity, premium packaging, and competitive pricing. Our service emphasises a seamless online experience — from virtual try-ons and home trials to fast delivery with transparent tracking and easy returns. For those seeking vision correction, the RB3757 Kai is prescription-ready with options to tailor lenses to your prescription, ensuring superior clarity while preserving the design integrity of the frame.

Elevate your eyewear collection with the Ray-Ban RB3757 Kai, a statement of designer sunglasses style and luxury eyewear craftsmanship. Explore the available finishes, place your order with confidence, and enjoy the assurance of authentic Ray-Ban optical frames from Ardor Eyewear — where premium frames meet personalised service.

Product Specifications

Model Code: Ray-Ban - RB3757 - Kai - Sunglasses
Brand: Ray-Ban
Product Type: Sunglasses
Barcode 8056262454008
Gender: Unisex
Model Name: Kai
Theme: Nowness
Suits These Face Shapes: Square Face, Oblong Face, Heart Face, Diamond Face, Narrow Face

Frame Specifications

Frame Shape: Oval
Front Material: Metal
Frame Front Colour: Grey
Front Colour (detailed): Gunmetal
Frame Temple Material: Metal

Lens Specifications

Lens Color: Dark Violet
Lens Material: Polyamide Bio
Lens Base Curve: Base 2

Size & Fit Details

Lens Width: 56 MM
Lens Height: 34 MM
Bridge Size: 15 MM
Temple Length: 145 MM
Size Guide: L
Geofit: Adjustable Nosepads

Ray-Ban Packaging

Ray-Ban Packaging

*The packaging image is for reference purposes only; actual packaging may differ.

Order placed Ordered 2 Jun
Order prepared Order Ready 6 Jun - 8th Jun
Out for delivery Delivered 12 Jun - 15 Jun

Need Help?

Available: MON to FRI: 10:00AM - 05:00PM

Our Sleep Specialists are here for you.
View full details

As Seen On You

Real customers, real style

Designer Eyewear, Done Right.

Authorized UK retailer of Ray-Ban, Oakley, Gucci, Tom Ford, Persol, Saint Laurent and 25+ more. Every pair guaranteed authentic, dispatched from our Derby HQ with free UK delivery, 14-day returns and a 2-year warranty — prescription orders included.

100% Authentic. Direct from authorized brand partners.

Every Ray-Ban, Oakley, Tom Ford, Gucci and Persol you'll find here is sourced through our authorized partnerships — never resellers, never grey market. Each pair arrives in its original branded case with manufacturer documentation, ready to verify on the brand's official website.

Pair it with Carl Zeiss or Essilor prescription lenses, fitted in-house by qualified opticians — with anti-reflective, blue-light, photochromic or polarized upgrades to suit how you wear them.

Frames Picked For Your Face — Not Just Your Style

Not sure where to start? Our Shop by Face Shape collection groups frames by what genuinely flatters — round, oval, square, heart and oblong — so you're already shortlisted to what suits you.

Each frame is hand-curated by UK optical specialists who've fitted thousands of customers. Need help picking? Our face-shape guide walks you through it in under a minute — no email or signup required.