The CleanSpace Full Face Mask Spectacle Kit (PAF-1017) is designed to allow prescription lens to be used with the Full Face Mask without compromising the face seal. The frame is fully adjustable for all face sizes, wide frames to fit large lenses for peripheral vision » The frame is engineered to provide stability during vigorous activity and is easy to fit and adjust. Designed for comfort over long periods Allows sweating and breathability Easy to wash and quick drying Designed for long wear in harsh environments Easy and quick replacement