Red Wing Medium Weight Safety Glasses provide protection for all-day wear and comfort. The 3-position frame width adjustment and flexible temples and rubber nose piece provide a customized, comfortable fit. These glasses are made of optical grade 100% durable polycarbonate and finished with an anti-scratch hard coating with added anti-fog advantage and protect against 99.9% of harmful UV light. Meets or exceeds ballistic fragmentation impact standards per MIL PRF-32432, Clause 3.6.3.