The Beck XMB80 are great sunglasses for all activities in bright to extremely bright light levels. The lenses offer class one protection against harmful light, whilst the Karbon TX frames are designed for a great fit, comfort and non-slip reliability.Karbon TX bi-core frame - lightweight and very tough buildXTR Karbon8 class one lenses - protect against UVA UVB and other harmful lightNon-slip adjustable nose padsMoulded templesLenses: Blue Mirror - for bright to extremely bright conditions