Matte Tortoise (Frame) / Polar Brown (Lenses)
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Smith - Mt. Shasta

The Mt. Shasta from Smith Optics features a breezy, refined, retro, breakfast club, cat-eye frame shape and offers polarized and non-polarized lens options.

Technical specifications & features

Gender Men's
Waterproof Yes
Other Features • 6 Base Lens Curvature
• Adjustable Wire-Core Temple
• Barrel Hinges
• Carbonic TLT Lenses
• Cellulose Propionate Frame Material
• Frame Measurements 55-18-140
• Medium Fit / Coverage

Carbonic Polarized and Non-Polarized Lenses
Carbonic lenses are optically tuned in a wide range of tints offering you visual comfort and protection from the urban grind to the mountaintop.

Tapered Lens Technology (TLT)
"Objects in lens are exactly the same as they appear." When light passes through a medium it refracts, i.e. changes course. If left uncorrected, this refraction can cause visual distortion and eye fatigue. Smith's Tapered Lens Technology (TLT) straightens out the incoming light rays by progressively tapering the lens from the optical center toward the peripheral view. What this means for you is that you see with 100% accuracy and maximum comfort.

Precision polarization engineered to obliterate glare
It's like noise-canceling headphones for your eyes. Glare off of horizontal surfaces like snow, water, and asphalt, decreases depth perception, and reduces visual acuity which causes eye fatigue. Smith Optics precisely aligns the polarized visual layer inside our lenses to filter out 99.9% of this "visual static" for a finely tuned view of the action

Lens Construction
1. Frontside Hydroleophobic Coating
2. Multi-layer Mirror Coating
3. Anti-scratch Protection
4. Techlite Glass or Carbonic Material
5. Smith Polarized File
6. Techlite Glass or Carbonic Material
7. Anti-Scratch Protection
8. Multi-layer Anti-reflective Coating
9. Backside Hydroleophobic Coating

Smith Optics uses the best lens materials in the world - Techlite Glass for optical precision and Carbonic for impact resistance. Smith Optics precisely alights the finest polarized filters and finish their lenses with multi-layer mirror, Anti-Reflective, anti-scratch, and Hydroleophobic lens coatings. The end result is an artfully crafted lens that preserves color perception and delivers optimized optical clarity and precision in all environments.

Placed at the nose and on the temple tips, Megol gently grips your skin to help keep the frame in place. The gripping power increases when introduced to moisture. HYDROLEOPHOBIC COATING
Repels moisture, grease, and grime. A barrier between your lenses and the world. Water will bead up and disperse without streaking. Smudges from fingerprints are wiped clean easily.

Vacuum applied Anti-Reflective (A/R) coatings on the back side of the lens will eliminate bothersome sidelight reflections.

Base Curve
The base curve is the radius of the sphere measured from the back of the lens. Smith features styles with 6,8, and 9 base lens curvature. Models that include 6 base tend to be more flat relative to your face. While 9 base styles provide the maximum amount of wrap around your face.

Handmade Acetate
A 33-step handcrafted process that features the inclusion of wire-core temples for a customized fit. A huge variety of rich color combinations that possess depth and have a distinct character are made possible with this material.

Spring Hinge
Stainless steel optical hinges incorporate small springs within the hinge structure that keep the temples snug against your head. This type of hinge is designed to smoothly self adjust in order to accommodate a broader range of head shapes and sizes more comfortably.

Grilamid® TR90
Resilient, tough, and flexible. Grilamid® TR90 is an exceedingly light and durable plastic that will maintain its shape under all temperature conditions.

• For nearly 50 years Smith has been a steward of the outdoors. The Smith customer is a socially conscious hard charger. Great days in the water, dirt, and snow are made better when Smith is mindful to protect the environment they recreate in.
• Smith incorporates the revolutionary, Rilsan® Clear material into what has become the largest eco-friendly sunglass collection in the world. This material allows them to create lightweight, durable frames, that are over 53% bio-based.
• Rilsan® Clear is derived from the renewable, non-genetically modified castor plant. Characteristics of this material include flexibility, lightweight, high elasticity, remarkable toughness, and excellent chemical resistance. Most importantly, this material is not petroleum based.
• Why is 53% bio-based important? Through extensive testing and field trials, Smith has found the correct balance of materials required to sustain performance and durability, while reducing their environmental impact.
• Smith's brand heritage was forged with a passion for the outdoors. This responsibility continues to drive them today. Smith recognizes their obligation to be considerate to the environments they revere. With an unwavering commitment to further develop, they explore the use of sustainable manufacturing materials into the Smith product of today, and into the future.

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