The STEPPER Eyeglasses SI-4137 F010 are a lightweight premium optical frame that reflects Stepper’s signature philosophy of German-engineered comfort, minimalist styling, and ergonomic precision. Designed for users who prioritize ultra-lightweight everyday eyewear with a refined professional appearance, this model combines durability, flexibility, and all-day comfort.

The SI-4137 features a full-rim rectangular / softly squared silhouette with clean contemporary lines that create a modern yet understated look. The design follows Stepper’s comfort-first approach, emphasizing lightweight engineering and balanced proportions rather than oversized fashion styling. Its versatile rectangular structure makes it suitable for both office and casual everyday use.

The “F010” color code is commonly associated with a classic black finish, giving the frame a sleek and timeless appearance. Depending on lighting and production variation, the finish may appear as matte black or deep charcoal black, maintaining a professional and versatile aesthetic suitable for nearly all styles and skin tones.

Crafted from lightweight titanium or Stepper’s TX5 high-performance material depending on production variation, the frame is engineered to provide exceptional comfort while remaining highly durable and corrosion resistant. Stepper eyewear is widely appreciated for its lightweight feel and ergonomic construction, making it ideal for users who wear glasses continuously throughout the day.

The frame includes ergonomic skull temples, flexible hinge construction, and a comfort-focused bridge design, helping distribute weight evenly across the face while minimizing pressure on the nose and ears. This ergonomic engineering enhances stability and comfort during prolonged wear such as office work, reading, or extended screen use.

The rectangular lens geometry supports a wide range of lens configurations, including:

• Single vision lenses
• Reading lenses
• Bifocal lenses
• Progressive lenses

Typical sizing for the SI-4137 is approximately 54 mm lens width, 17 mm bridge, and 140 mm temple length, placing it in a medium-fit category suitable for many adult face shapes.

Key Features

• Brand: Stepper
• Model: SI-4137
• Color Code: F010 (Classic Black / Matte Black tone)
• Frame Style: Full-rim rectangular optical frame
• Material: Lightweight titanium or TX5 high-performance material
• Design: German-engineered minimalist ergonomic eyewear
• Shape: Rectangular / softly squared silhouette
• Fit: Medium fit (approx. 54–17–140 mm)
• Bridge: Comfort-focused ergonomic bridge
• Hinges: Flexible lightweight hinge system
• Temples: Ergonomic skull temples for secure fit
• Gender: Primarily men’s styling, though wearable as unisex
• Comfort: Ultra-lightweight pressure-free construction for all-day wear
• Lens Compatibility: Prescription, reading, bifocal, and progressive lenses
• Style Identity: Minimal professional eyewear with technical lightweight aesthetics

Stepper eyewear is especially respected among optical users and opticians for its exceptional comfort, lightweight engineering, and ergonomic fit philosophy. The SI-4137 F010 continues that tradition by offering a refined minimalist design with dependable long-term everyday wearability.