Demetz Smash Adult & Teens Prescription Sports Glasses – Black-Grey, 57mm

The Demetz Smash in Black-Grey (57mm) is a strap-secured sports goggle with shock absorbers at the nose and temples, anti-fog vents, and a double-buckle strap that adjusts to any head size.

The Smash is made by bi-injection: a rigid G850 core (a bio-sourced polymer, around 45% castor-oil based) with a rubber outer layer. Shock absorbers at the nose and temples take the sting out of a direct hit, vents in the frame keep the lens from fogging, and the double-buckle strap adjusts without slipping. Official size 57/18, 137mm wide, 38.8mm lens height, 39g.

Demetz designs and makes its frames in France as CE-marked optical frames built for sport: every size in the range takes a full prescription lens, and the bi-injection construction is what lets the frame absorb knocks and stay on the face.

Demetz is a French sports-optics house founded in 1950 by an optician and diver who built the first optical diving mask and, later, the first optical swimming goggles. Its frames are sold through opticians only, which is why you will not find Softness R on marketplace sites.

Key details

• Brand: Demetz — Smash
• Colour: Black-Grey
• Type: Prescription sports goggles, strap
• For: Adults and teens

Size & fit

Lens 57mm · Bridge 18mm · Total width 137mm · Lens height 41mm.

At 137mm total width, this frame suits a medium-to-wide face. Not sure? Send us a photo or your current glasses measurements on WhatsApp, or use home try-on in Dubai or Abu Dhabi.

Which lens should you choose?

Sports frames need a lens that will not shatter. Ordinary plastic (CR-39) lenses can crack into sharp pieces when a ball or elbow hits them, so we never fit them in a sports frame. Every lens below is chosen for impact safety first:

• Polycarbonate (standard) — our default sports lens. Very impact-resistant, light, and it blocks UV on its own. The right choice for most prescriptions up to ±6.00.
• Trivex (upgrade, prescriptions up to ±3.50) — the same shatter resistance as polycarbonate, but lighter and with noticeably sharper, clearer optics. Worth it if you wear the goggles for long sessions.
• Tribrid (upgrade, ±3.51 to ±6.00) — for moderate prescriptions. Thinner and lighter than polycarbonate at the same power, while keeping impact resistance. Avoids the thick-edge look on stronger minus powers.
• 1.60 MR-8 photochromic — choose this when you want a lens that darkens outdoors or a tinted finish. Clear indoors, up to around 50% dark in sunlight.
• Polycarbonate Transitions Gen S — the fastest-reacting light-adaptive option in a shatter-resistant material. Up to 70% dark outdoors, fully clear indoors. Ideal for outdoor sport in the UAE sun.
• 1.67 high index (above ±6.00) — for strong prescriptions, a thinner and lighter lens that still sits properly in the frame. It is not impact-rated like polycarbonate or Trivex, so our optometrist will advise on the best balance of thickness and protection for your sport. Available clear, photochromic grey, or with Transitions Gen S.

Prescriptions above ±9.00 are handled personally — send us your prescription on WhatsApp and we will confirm what this frame can take.

How to order this frame with lenses online

1. Choose your lens type — Clear Lenses or Photochromic Lenses.
2. Enter your prescription exactly as written, including the + and − signs and the axis. The lens selector uses it to show only the lens materials that suit your power.
3. Select your lens — the standard option is pre-set; upgrades are shown alongside with their price.
4. Add to cart and check out. The final price is shown before checkout.

Have your own lab? Tick “Buy Frame Only” below the lens selector to buy the frame on its own. Prefer help? Send your prescription on WhatsApp and we will set it up for you.

Why buy from Optic One

Optic One is a DOH-licensed optical store in Abu Dhabi with free delivery across Dubai and all UAE, and shipping to the GCC and worldwide. Every pair is glazed and checked by our optometrist-led team — lenses are centred to your pupils, which matters more in a curved sports frame than in everyday glasses. Visit our Abu Dhabi store for in-person fitting, or order online with expert support on WhatsApp. Home try-on is available in Dubai and Abu Dhabi. All Demetz frames are 100% genuine and covered by a 1-year warranty against manufacturer defects.

Frequently asked questions

Why can’t I use my normal glasses lenses in a sports frame?
Standard CR-39 plastic and glass lenses can shatter into sharp pieces on impact. Sports frames are glazed only with polycarbonate, Trivex or Tribrid, which absorb a hit without breaking. Polycarbonate is included as the standard option on this frame.

Polycarbonate or Trivex — which is better for sport?
Both are shatter-resistant. Polycarbonate is the standard and suits most prescriptions. Trivex is lighter with sharper optics, so it is the better choice if you wear the goggles for long sessions or have a light prescription (up to ±3.50). For ±3.51 to ±6.00, Tribrid gives a thinner lens.

Can I get these with lenses that darken in the sun?
Yes. Choose Photochromic in the lens selector: 1.60 MR-8 grey (up to about 50% dark) or polycarbonate Transitions Gen S (faster, up to 70% dark). For prescriptions above ±6.00 the same options come in 1.67 high index.

Does the Demetz Smash come with a strap?
Yes — the adjustable strap is included.

I’m not sure what size is right for me. How can I make sure I get the right size?
Use our home try-on service in Dubai and Abu Dhabi: choose the frames you want to compare, try them at home, and keep only the one that fits. You can also send us a photo wearing your current glasses, or the measurements printed inside their temple arm, on WhatsApp and we will tell you which size to order. Visiting Abu Dhabi? Come to the store and we will fit it in person.

Do you deliver to Dubai?
Yes — free delivery across Dubai and all UAE. Home try-on is available in Dubai and Abu Dhabi, and you can visit our Abu Dhabi store for fitting.

Do you ship prescription sports goggles to Saudi Arabia, Oman, Qatar, Kuwait or Bahrain?
Yes. We ship prescription sports goggles to Saudi Arabia, Oman, Qatar, Kuwait and Bahrain, and worldwide. Send us your prescription and frame size on WhatsApp; we glaze the lenses in Abu Dhabi, check the fit, and courier the finished pair to you. Shipping cost and delivery time are confirmed before you pay.

Home try-on terms & conditions