Lens Materials Compared for B2B Sunglasses Buyers

Lens material decides more than the feel of a sunglass frame. It affects landed cost, optical quality, impact performance, coating options, compliance risk, and production lead time. For B2B buyers, the wrong choice can mean failed testing, avoidable returns, or a product that looks fine on a sample table but performs poorly in the market. This guide compares five common lens materials used in custom sunglasses: polycarbonate, CR-39, nylon, glass, and Trivex. The figures below reflect factory quoting and production ranges for MOQ 50, 300, 1000, and 5000+ pairs, with notes on Abbe value, density, impact testing, coatings, and export compliance.

Why lens material matters before your first order

Every sunglass order starts with a lens decision. Get it wrong and the damage is practical: higher returns, heavier frames, coating complaints, failed inspections, or customs questions over CE marking. The lens is not a small detail. It is one of the main cost and risk drivers in the product.

• Weight – density ranges from 1.02 g/cm³ for Trivex to 2.60 g/cm³ for glass. A 50mm lens usually weighs about 3.5g to 6.5g. Heavier lenses may require thicker temples, stronger hinge pins, and tighter frame QC.
• Impact resistance – polycarbonate at 1.0mm can pass the FDA drop-ball test. CR-39 normally needs around 2.0mm for basic impact performance. Glass can pass some basic requirements at sufficient thickness, but it remains brittle. Use it carefully.
• Optical clarity – CR-39 and glass sit at the top, with Abbe values around 56–60. Polycarbonate is lower, typically 28–32, so edge color fringing is more visible in larger lenses and wrap frames.
• Scratch resistance – glass is naturally hard. Most plastics need a hard-coat. Bare polycarbonate and bare CR-39 scratch too easily for normal retail use.
• Cost at volume – CR-39 is often the lowest-cost option at scale. Polycarbonate costs slightly more but brings better impact resistance. Nylon and Trivex cost more and need a clearer product reason.

Do not choose one material for every SKU by habit. Match the lens to the frame design, price point, market, and compliance target. That is where most sourcing mistakes start.

How the five materials compare

Prices are for tinted non-prescription lenses with standard factory hard-coat unless noted. Add $0.15–$0.40 per pair for polarization, depending on material and film method. Add $0.10–$0.25 for mirror coating. Add $0.25–$0.50 for anti-reflective coating. Final pricing changes with base curve, lens diameter, center thickness, tint, coating stack, and inspection level.

Simple rule: cheaper lenses are not always cheaper products. A low lens price can disappear fast if the material creates coating failures, excess weight, or compliance retesting.

Polycarbonate: strong impact performance, weaker optics

Polycarbonate is the default lens material for many custom sunglass programs. It is light, tough, and fast to mold. For kids' sunglasses, budget sport frames, promotional eyewear, and safety-influenced designs, it often makes sense.

1. Impact resistance: Polycarbonate performs well in basic impact testing. At suitable thickness, it can meet FDA drop-ball requirements and support ANSI Z80.3 programs. This is the main reason buyers choose it.
2. Weight: Density is about 1.20 g/cm³. A 50mm lens at 2.0mm center thickness is roughly 4g. That helps with larger frames and semi-rimless designs.
3. Optics: Abbe value is usually 28–32. That is the trade-off. Color fringing can show at the edge of the lens, especially in wrap shapes or wide fashion frames.
4. Scratch resistance: Bare polycarbonate is soft. Use a hard-coat for retail product. Skipping it saves a few cents and creates complaints later.
5. Tinting: Polycarbonate can tint unevenly in some processes. In-mold coloring gives better density control for solid tints. CR-39 is usually easier for gradient tint work.

Buyer warning: do not use polycarbonate only because it sounds safer. Check the optical expectations of the product. For premium driving lenses or larger lifestyle frames, the lower Abbe value may be visible to customers.

Good for impact. Less good for crisp optics. That is the deal.

CR-39: clear optics and strong value at volume

CR-39 is the optical workhorse for non-prescription and prescription sunglass lenses. It is not the toughest material, but it delivers sharp vision, stable tinting, and attractive unit cost. For many adult lifestyle and driving frames, it is the cleanest choice.

• Clarity: Abbe value is typically 56–60. Color fringing is low, and visual sharpness is strong across normal lens shapes.
• Weight: Density is about 1.32 g/cm³. It is heavier than polycarbonate but still comfortable in most metal and acetate frames.
• Scratch resistance: Bare CR-39 scratches at about 3H pencil hardness. A factory hard-coat normally brings it to about 6H–7H. For retail, the coating should be treated as standard, not optional.
• Impact: CR-39 can pass basic impact requirements at the right thickness, commonly around 2.0mm. It is not the right material for safety goggles, tactical eyewear, or high-velocity impact claims.
• Cost: CR-39 is often the lowest-cost material at 5000+ pairs, usually around $1.20–$1.75 FOB for standard tinted lenses. It also tends to have more stable raw material pricing than polycarbonate.

Lead-time note: CR-39 needs casting and curing time. Bulk orders usually run 30–35 days, compared with 25–30 days for many polycarbonate programs. Plan it into your launch calendar.

Gradient tint note: CR-39 takes bath dyeing well. If the design depends on a smooth top-to-bottom gradient, start here.

Nylon: light, flexible, and built for sport frames

Nylon, or polyamide, is common in sport wraparounds and rimless sunglasses. It is light, flexible, and more heat-resistant than polycarbonate. It also costs more. Use it when the frame geometry needs it.

• Density: Nylon typically runs 1.10–1.15 g/cm³. A 50mm lens at 2.0mm center thickness is about 3.8g.
• Flexibility: Nylon bends before it breaks. That helps in wrap frames, rimless designs, and lens shapes that take edge stress.
• Optical clarity: Abbe value is usually 42–48. It is better than polycarbonate but not as sharp as CR-39.
• Heat resistance: Nylon holds shape better under heat. It is useful when the frame or decoration process involves higher temperatures.
• Cost: At 5000+ pairs, expect roughly $2.00–$2.80 FOB. At MOQ 50, the range is closer to $2.50–$3.80. Resin cost and molding conditions drive the premium.

Compliance: nylon can support ANSI Z80.3, CE EN ISO 12312-1, and REACH programs when specified and tested correctly. It is not our first recommendation for high-precision Rx because optical power control is usually easier with CR-39.

Nylon is for sport shapes, heat, and flex. Not for the cheapest SKU in the line.

Glass: excellent optics, poor impact behavior

Glass lenses still have a place in sunglasses, but it is a narrow place. They offer excellent clarity and strong scratch resistance. They are also heavy and brittle. That combination works for some premium fashion and driving frames, but not for active use.

1. Clarity: Glass usually carries an Abbe value around 58–60. Distortion and color fringing are very low.
2. Scratch resistance: Glass is naturally hard, around Mohs 5.5. It does not need the same hard-coat strategy as plastic lenses.
3. Impact: Glass can fracture. Thickness helps, but it does not remove the core risk. Do not position glass lenses for sports, kids' eyewear, or high-impact use.
4. Weight: Density is about 2.50–2.60 g/cm³. A 50mm lens at 2.0mm center thickness can weigh around 6.5g. Frame hardware must be specified accordingly.
5. Cost: At 5000+ pairs, glass often prices around $1.50–$2.20 FOB. Extra grinding time, higher shipping weight, and breakage controls can offset the attractive unit price.

Compliance note: glass lenses may support CE EN ISO 12312-1 and basic FDA impact requirements at the right thickness and design. They should not be sold with safety or sport-impact claims unless the exact product has passed the required test.

Polarization: polarized glass is possible through laminated construction. It raises thickness, weight, and cost. Use it only when the premium positioning justifies it.

Trivex: premium light weight with high impact strength

Trivex is a urethane-based lens material developed for high-impact optical use. It is lighter than polycarbonate, clearer than polycarbonate, and tougher than CR-39. It is also the most expensive option in this comparison.

• Optical clarity: Abbe value is usually 43–46. That puts it above polycarbonate and below CR-39.
• Impact resistance: Trivex has very strong impact performance at low thickness. It is a serious option for tactical, industrial, and premium sport programs.
• Weight: Density is about 1.02 g/cm³. A 50mm lens at 2.0mm center thickness is roughly 3.5g. Large frames benefit most.
• Cost: At 5000+ pairs, expect about $2.50–$3.50 FOB. At MOQ 50, $3.50–$5.00 is more realistic. The raw material premium is significant.
• Tinting: Trivex can take tint evenly. For color-critical orders, confirm the tint process and approve physical samples before bulk production.

Trivex is not a default material. It belongs in products where light weight, impact claims, and premium positioning all matter. If the frame sells below about $40 wholesale, polycarbonate often makes more commercial sense.

Use Trivex when the spec earns the price.

Decision flow for your next bulk order

Start with the product requirement, not the material name. Price, frame shape, lens size, market, and compliance target should decide the choice.

1. Wholesale price below $12? Choose polycarbonate with hard-coat for most budget and promotional sunglasses. It keeps weight low and impact performance strong.
2. Wholesale price $12–$20 with clear optics needed? Choose CR-39 at suitable thickness with hard-coat. It is the best value for many adult lifestyle and driving products.
3. Sport wraparound or rimless design? Choose nylon when the lens needs flex, heat resistance, or better edge durability.
4. Premium fashion or driving product with low activity risk? Consider glass, but account for weight, breakage risk, shipping weight, and labeling.
5. High-impact or premium lightweight claim? Choose Trivex if the product can absorb the price. Otherwise, compare it against polycarbonate before approving the BOM.

Every bulk order should have a material spec sheet, lens category, UV requirement, coating details, and compliance target before sampling. For EU sales, confirm CE EN ISO 12312-1 requirements early. For the US, confirm FDA impact requirements and any ANSI Z80.3 claims. For Australia and New Zealand, plan for AS/NZS 1067 testing.

There is no universal best lens material. There is only the right material for the frame, price, use case, and market.

Why source this from Wenzhou with LumiShades

Wenzhou in Zhejiang Province is widely regarded as China’s eyewear manufacturing capital, producing a large share of the world’s sunglasses. That concentration matters to buyers: a deep local supply chain for acetate sheet, hinges, lens blanks, plating and packaging means shorter component lead times, easier color and material matching, and a workforce with decades of eyewear-specific skill. LumiShades has manufactured in this ecosystem since 2009, and our vertical integration — in-house injection molding, acetate cutting, CNC milling, lens tinting, decoration and quality control — means no part of your order is quietly subcontracted to a workshop you cannot audit.

For international buyers, that vertical control translates into accountability. When a single factory owns every step, defects are traced and fixed at source rather than bounced between vendors, and your specifications survive intact from first sample to bulk. We back this with 15+ years of experience, shipments to 60+ countries, more than 5 million pairs produced per year and a 98.5% on-time delivery rate. Our certifications — CE EN ISO 12312-1, FDA registration, ANSI Z80.3, AS/NZS 1067, REACH, ISO 9001 and BSCI audit — mean the compliance documentation your market requires already exists. Explore our manufacturing capabilities and quality control process to see how this works in practice.

Frequently asked questions

Which lens material is cheapest at MOQ 50 pairs? CR-39 is usually the lowest-cost option at MOQ 50, often around $1.50–$2.20 per pair FOB Wenzhou with standard hard-coat. Polycarbonate is commonly $1.80–$2.50. Nylon, glass, and Trivex usually cost more at low volume. Prices improve at 300, 1000, and 5000+ pairs, but the ranking often stays similar unless the design or coating stack changes.

Can you mix lens materials in one bulk order? Yes. Orders can be split by SKU, such as polycarbonate for kids' frames and CR-39 for adult driving frames. The MOQ is normally handled per design and material. Mixed-material orders may add 3–5 days because production is batched by process: injection molding, casting, CNC cutting, coating, and final assembly.

What certification do I need for lenses sold in the EU? For sunglasses sold in the EU, you need CE marking under EN ISO 12312-1 for general-use sunglasses. The product must meet requirements for UV protection, optical performance, lens category, markings, and documentation. A declaration of conformity should ship with the order. For children's sunglasses or special-use products, confirm any additional standards before production.

How long does it take to get a sample before bulk production? Lens samples usually take 7–10 days after CAD and material approval. The sample request should include frame shape, lens material, base curve, center thickness, tint, coating, and any polarization or mirror requirement. Add 2–3 days for more complex coating or polarized samples.

Which material should I choose for polarized sunglasses? CR-39 with laminated polarizing film is the common B2B choice because it balances clarity, cost, and polarization performance. Polycarbonate polarized lenses are lighter and stronger but can show more color shift. Glass polarized lenses look sharp but are heavy. Trivex polarized lenses perform well but carry a higher price. For most 5000+ pair programs, CR-39 is the starting point.

Does LumiShades apply anti-reflective coating on these materials? Yes. AR coating is commonly applied to polycarbonate and CR-39, with typical added cost around $0.25–$0.50 per pair depending on the stack. Nylon and Trivex can also be AR-coated on request. Glass can be coated, but the product use case should justify it. Always confirm adhesion, abrasion, and cosmetic inspection standards before bulk production.