Insert for 3M™ SecureFit™ 200 and 400 Series Glasses Polycarbonate lens ,close-fitting prescription insert Maximum dioptre typically +/- 6 dioptre
The user clips filled prescription insert behind 3M™ SecureFit™ 200
or 400 models to create prescription safety glasses
3M’s innovative SecureFit™ Pressure Diffusion Temple technology design features slotted ribs that provide comfortable pressure equalization. The temples flex and self-adjust to the size of wearer’s head.