The abbreviation HELM Matte Trans Blk, HGBM specifies a distinct color and lens combination for SPY Optic's vintage-inspired, square-frame sunglasses: the Helm model configured with a Matte Translucent Black frame and Happy Gray Green Blue Spectra Mirror lenses.

Specific Configuration Details

• HELM: A modern-retro classic frame featuring aggressive, clean lines and a signature keyhole bridge. It is slightly more compact with a more casual, everyday aesthetic compared to the oversized Cyrus frame.
• Matte Trans Blk: Stands for Matte Translucent Black. This means the frame has a frosted, semi-sheer dark finish where you can see hints of light passing through the plastic material under direct sunlight, rather than a solid black color.
• HGBM: Stands for Happy Gray Green Blue Spectra Mirror. This setup features SPY's therapeutic Happy Lens technology built over a natural contrast gray-green base tint. The exterior is coated with a striking blue mirror finish that cuts harsh reflections and glare.

Frame Measurements

• Lens Width: 57 mm
• Bridge Width: 18 mm
• Temple Length: 140 mm
• Lens Height: 40 mm

Key Structural Features

• 6-Base Polycarbonate ARC® Lenses:
  Tapered lenses mapped to the optical curve of the human eye to minimize peripheral distortion and prevent glare-induced eye fatigue.
• Grilamid® Construction:
  Built using SPY's lightweight, flexible, and virtually indestructible polymer framework designed for sports, driving, and lifestyle utility.
• Integrated Hinges:
  Streamlined pin hinges that keep the temples securely attached while creating a flush profile on the sides of your face.