The 3M SecureFit 400 Series safety glasses feature patented Pressure Diffusion Temple Technology that lets the temples flex and self-adjust to individual head sizes, eliminating the need for multiple frame sizes on job sites. Weighing under one ounce, the polycarbonate lenses absorb 99.9% of UVA and UVB rays and carry an anti-fog coating to maintain clear vision in hot and humid conditions. The soft, adjustable nose pads and dual-injected padded temple touchpoints deliver all-day comfort. Meets ANSI Z87.1-2020 and CSA Z94.3-2007 high-impact requirements.
Do these fit under a hard hat without pressure?
Yes. The Pressure Diffusion Temple Technology allows the temples to flex and self-adjust, applying pressure to the less-sensitive back of the head rather than the temples, which makes them compatible with most hard hats and hearing protection.
Does the anti-fog coating actually work?
The coating reduces fogging in most conditions. Some users report fogging in very high-humidity or steam environments. For extreme conditions, the Virtua CCS with foam gasket may provide better fog resistance.
Can people with large heads wear these comfortably?
Yes. The self-adjusting temple design accommodates a wide range of head sizes without needing to stock multiple sizes. Users with head circumferences up to about 25 inches report a secure, comfortable fit.
Are these ANSI Z87.1 certified?
Yes. The SF401AF meets the High Impact Requirements of ANSI Z87.1-2020 and CSA Z94.3-2007.
Do the nose pads fall off?
The soft silicone nose pad pieces can detach during cleaning. They can be snapped back into place, but it is worth cleaning the glasses carefully to avoid losing them.
# 3M™ SecureFit™ 400 Series Safety Glasses SF401AF, Clear Anti-Fog Lens **Model:** `SF401AF` **Brand:** 3M **Category:** Safety Glasses > The 3M SecureFit 400 Series safety glasses feature patented Pressure Diffusion Temple Technology that lets the temples flex and self-adjust to individual head sizes, eliminating the need for multiple frame sizes on job sites. Weighing under one ounce, the polycarbonate lenses absorb 99.9% of UVA and UVB rays and carry an anti-fog coating to maintain clear vision in hot and humid conditions. The soft, adjustable nose pads and dual-injected padded temple touchpoints deliver all-day comfort. Meets ANSI Z87.1-2020 and CSA Z94.3-2007 high-impact requirements. ## Specifications | Attribute | Value | |---|---| | Product Type | Safety Glasses | | Ansi Rating | Z87.1-2020 | | Lens Material | Polycarbonate | | Lens Tint | Clear | | Anti Fog | Yes | | Anti Scratch | Yes | | Frame Color | Green/Black | | Style | Wraparound | | Over The Glass | No | | Weight (lbs) | 0.063 | | Barcode (UPC) | | ## What's Included - 1 pair safety glasses Source: https://www.jaspecs.com/3m/safety-glasses/sf401af-3m-securefit-400-safety-glasses-clear/