3M SecureFit 400 Safety Glasses (SF400 CC1)
Light 19 g clear polycarbonate safety glasses with anti-fog and anti-scratch coatings and side protection — everyday eye protection for trimming.
In short:The 3M SecureFit SF400 CC1 are rimless, clear polycarbonate safety glasses weighing 19 g, with anti-fog and anti-scratch coatings on both sides, side protection, an adjustable nose bridge and 3M's pressure-diffusing temples. They block 99.9% of UVA and UVB. They suit everyday trimming with line; for blade work and heavy debris, add a mesh or clear visor over them.
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Pros
- Very light at 19 g, with an adjustable nose bridge
- Anti-fog coating on both sides helps keep them on
- Clear lens works in low light and shade
Cons
- Not a full face shield for heavy blade work
- Glasses alone don't protect the rest of the face
Eye protection is non-negotiable with a brush cutter: line and blades throw stones and debris at high speed. The 3M SecureFit 400 (SF400 CC1) are light, clear safety glasses that stay put and resist fogging, so you actually keep them on.
What the listing confirms
The Amazon.co.uk listing gives clear polycarbonate rimless lenses with side protection, anti-fog and anti-scratch coatings on both sides, 3M’s pressure-diffusing temple technology, an adjustable nose bridge, 99.9% UVA/UVB absorption and a weight of 19 g. It was sold by Amazon when we checked in October 2026.
Glasses or a visor?
For line trimming, good safety glasses are the minimum. With a metal blade, or in stony ground, add a visor: a mesh face shield or a clear face shield protects the whole face, and you keep the glasses underneath. Look for the EN 166 marking on the frame and check the impact grade — what the letters mean is explained in eye protection standards for brush cutting.
Who it’s for
Everyone who uses a trimmer or brush cutter — and anyone standing nearby. Keep a spare pair in the shed. The full kit is covered in the best safety gear for brush cutting.
More safety gear we cover
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- AttenuationSNR 27 dB
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- StandardEN 352-1
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- MountingHelmet clips (headband version also made)
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