Birdz Swallow Over Glasses Photochromic Sunglasses

Z87 Impact Testing

The ANSI standards and markings Z87 and Z87+ indicate that eyewear provides wearers with protection against impact hazards.

For safety eyewear to be certified Z87-compliant, it must pass the ball drop test. This test involves dropping a steel ball (diameter: one inch; weight ±2.4 oz) from a height of 50 inches onto the eyewear. If the eyewear (i.e., lenses and frames) remains intact, it will be certified compliant.  

The addition of the plus sign (i.e., +) next to the Z87 marking indicates that the eyewear has been subjected to a much tougher set of tests, specifically the high mass impact test and the high velocity impact test.

The High Mass Test

This test consists of dropping a pointed 500 g weight from a height of ±50 inches onto lenses that are mounted on a head form. To pass this test, no pieces from the frames or the lenses may fracture or become detached.

The High Velocity Test

In this test, a 0.25-inch steel ball is shot at 20 specified impact points with speed and distance adjusted depending on the type of safety wear being tested:

•    Safety Glasses – the steel ball is shot at a speed of 102 m/h
•    Safety Goggles – the steel ball is shot at a speed of 170 m/h

The pass/fail criteria for the high velocity test is the same as the high mass test with the added criterion that the lenses of the eyewear being tested, when struck, cannot come into contact with eye areas on the head form.

Clean with a soft microfiber cloth only. Chemicals or other harsh detergents should not be used on these products

Returns - please contact us prior to returning any item/s

Our no fuss returns policy means that if for any reason you not entirely satisfied or change your mind about your purchase, please contact us at info@specs4sports.co.uk within 14 days of receipt of goods. Return the product/s to us in Original condition, unworn, unused and with all labels/tags still intact within 28 days of the date you received the item, and we will issue a refund within 14 days of receipt of goods once received.

Return Address:

Specs4Sports - Returns Department

3 Gendalls Way

Launceston

Cornwall

PL15 8SE

Tel. 01566 777436

We are not responsible for the return postage of the goods unless faulty. If you return goods for other reasons then you will need to pay the return postage costs and return using a signed for delivery service and provide us with the tracking number, in the unlikely event of your parcel going missing in transit, Specs4Sports cannot be held responsible for any returns parcels lost in the post, therefore keep your receipt as proof of postage.

If your original order was part of a Multibuy or contained a promotional discount then this will be taken into account and the refund price of individual items may differ from the original selling price.