What are the characteristics of the RILSAN frame and CR 39 lenses mentioned in the sunglasses description?
Unfamiliar English material names are listed in the product specifications, making one want to know what advantages and functions they provide during outdoor activities.
The frame uses an eco-friendly plastic material that is lightweight and highly elastic, and the lenses are fitted with standard optical lenses that filter out UV rays and minimize visual distortion.
The frame focuses on reducing weight, and the lenses focus on keeping your vision clear. RIL SAN CLEAR G850 (Rilsan Clear G850) is used for the frame of SIERRA DESIGNS Mojo sunglasses[1]. A castor oil-based bio-plastic, it is flexible yet highly elastic, giving it the property of not breaking easily even when subjected to impact. Thanks to this, the frame itself feels light, reducing the strain placed on the bridge of the nose and the ears even when worn for a long time[2].
The lenses are clear and hard. UV400 CR 39 (CR-39) is used for the lenses that protect the eyes[3]. CR 39 (CR-39) is lighter than glass and has low aberration that distorts objects, making it an optical plastic standard widely used in eyeglasses and sunglasses. On top of this, a treatment that filters out the ultraviolet spectrum up to 400nm is added, reducing glare and UV stimulation even outdoors under beaming sunlight[4].
The total weight of the Mojo sunglasses and the specific actual measurements of the frame have not yet been confirmed.
Product measurements
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SIERRA DESIGNS X PROGRESS Mojo Sunglasses LIGHT GREY
Other stated figures
| Part | FREE |
|---|---|
| 길이 ◦ | 14.5cm |
| 브릿지 | 2.3cm |
| 렌즈가로 | 5.1cm |
| 세로 ◦ | 3.9cm |
For rows marked with ◦, flat measurement or circumference could not be confirmed in official sources, so hmmm determined them using figures from the same item.