Detalles del producto
- Comparing upward-viewing prism-eyewear dimensions.
- Belay-equipment planning after checking actual optics and instructions.
- Assessing fit without assuming sun, impact or medical protection.
- One pair of refractive glasses/goggles.
- Case, cleaning cloth and retention strap are not itemized.
What optics are described?
Prism/refractive upward viewing; exact prism angle and field of view are not supplied.
What material and color are listed?
Plastic construction and black. Exact frame and optical materials are not specified.
What size and weight are given?
14.7 × 5.2 cm; no numerical weight is supplied.
Are they guaranteed to fit securely?
Flexible/non-slip wording appears without fit ranges or a retention test.
Is UV or impact protection verified?
No transmission test, impact approval or supporting standard is supplied.
Do they treat neck pain or guarantee less strain?
No clinical or ergonomic test is supplied for the comfort/strain claims.
Are they approved for navigation or direct-sun viewing?
No such approval is supplied. Confirm actual altered-viewing instructions and limits.
What is in the package?
One pair; case, cloth and retention strap are not itemized.