Features streamlined classic sports sunglasses from bloc xtr karbon8 polarised cat 3 optical class one lens offer maximum protection against uvauvb and harmful blue light up to 400nm lenses tested to bs en iso 12312 12013 karbon tx injected frames are hand finished flexible durable and lightweight sports hinge provides excellent strength fully adjustable hypoallergenic nose pads and non slip hypoallergenic temple tips maximise comfort and fit suitable for small to medium faces anti glare p