Salt. Bertram

SALT. Bertram is the 1950s statement square: Japanese acetate, functional rivet hinges, polarized optical-grade glass already in the chassis. SALT. writes it as inspired by bold sunglass styles of 1950s policy makers, with a universal-fit saddle bridge. We sell it as a 53 mm acetate square with a 20 mm bridge, not a wrap.

Japanese acetate, functional rivet hinges, polarized optical-grade glass and CR-39, plus AR, hydrophobic, and oleophobic coatings. Designed in California. Handcrafted in Japan. $470.

Who it’s for. Anyone who wants a heritage square sun in acetate, not a costume wayfarer. 53 mm eye, 20 mm bridge, 148 mm temples, 31 mm depth. The 31 mm B is the shallow square — come in and check it. Not a wrap.

Shape. Square (sun). Manufacturer tags the shape as square and describes a statement heritage frame inspired by bold 1950s sunglass styles, with a universal-fit saddle bridge.

Material. Japanese acetate; functional rivet hinges; Japanese componentry. Polarized optical-grade glass and CR-39 (colorways below list the lens SALT. currently pairs). Coatings: AR, hydrophobic, oleophobic.

Origin. Designed in California. 100% made in Japan.

Measurements (from SALT.)

• A (lens width): 53 mm
• B (lens height): 31 mm
• DBL (bridge): 20 mm
• ED (effective diameter): 53 mm
• Temple: 148 mm
• Common written size: 53–20–148

Colorways at SALT. (sun):

• Coastal Fog — Polarized Glass Denim
• Matte Woodgrain — Polarized Glass G-15
• Redwood — Polarized Glass Crimson