Free US Shipping
We offer Free Shipping on all orders over $99 within the US. During select promotions & holidays we will offer Free Shipping on all orders within the US.
1–3 Year & Lifetime Warranty*
We stand behind our products – with a 3 year warranty for goggles, 1 year on lenses, and a lifetime for sunglasses.
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At 509 we use the best SSL certificate and the most trusted payment processors provided by Shopify Payments.
See better after tossing in a fresh 509 Sinister MX6 Flow Lens, whether you’ve got a big scratch or the clouds roll in. This replacement lens fits our Sinister goggle and features high-flow, anti-fog Frogzskin® venting with a super fine mesh that lets in air and keeps dust out, and easily snaps into your existing frame so you can get back out there.
Key Features
- Fits all Sinister MX6 Goggle frames → Shop Now
- Flow Venting with Frogzskin® Technology allows more air flow reducing inner goggle humidity
- Single Pane Polycarbonate lens with anti-scratch outer coating, and internal anti-fog coating
- Improved tints and contrast improving lens technologies, including HCS, available
- Tear-off lens compatible → Shop Laminated Tear Off Refills
- ANSI 7.1 impact resistance tested, OSHA & FDA approved
- WARNING for California Residents
Specs
- VLT Conditions:
S0 = 80% to 100% Light Transmission
S1 = 43% to 80% Light Transmission
S2 = 20% to 43% Light Transmission
S3 = 10% to 18% Light Transmission
VLT (Visible Light Transmission) refers to the amount of light that can pass through the goggle lens. - Clear Lens - Night or Low-Light Conditions (VLT S0)
- Smoke Tint - Partly Cloudy/Sunny Conditions (VLT S2)
- Light Yellow HCS Tint - Night or Low-Light Conditions (VLT S0)
