Kids X-Small [Ages 5-7]
Kids Small [Ages 6-9]
Kids Average [Ages 9-14]
Kids Large [Ages 12-17]
Kids X-Large [Ages 14-18]
Adult Narrow
Adult Average
Adult Wide

Liberty Sport


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4.9 star rating 11 Reviews

Frosted Blue/Grey
Crystal Grey/Red
Matte Black/Blue
Crystal Grey/Black Stripe

Frame Fit


Tired of having to replace kids frames because they break too easily? Designed specifically for tween and teen boys the Z8-Y40 frames are virtually indestructible, providing comfort at school and durability at play for active boys.


  • A:51 DBL:15 TL:120
  • A:54 DBL:16 TL:130


  • Designed for active youth as their daily ophthalmic frame.
  • Made with Nylo-Flex™ material for the ultimate in flexibility and ruggedness.
  • ShockBlok™ LV1 Impact Dampening technology absorbs and transfers shock from the lens to the flexible frame.
  • Comfort Fit Nose Pad is injection bonded for maximum durability.
  • 3D Contour Grip™ allows for custom fit and all day comfort and is hypoallergenic.
Z8-Y40 has a rating of 4.9 stars based on 11 reviews.