The new 2016 version of the Proviz Reflect360 running jacket has had many design alterations to improve its performance and give you a highly reflective jacket that will help you stand out on the roads during hours of darkness and also feel and look Great. Our designers have focused on the weight of the jacket to give you optimum comfort. It weighs in at a feather-light 170G (size variable) so that you are not weighed down by an over-bearing jacket that feels like you are running in hiking jacket! the Reflect360 running jacket has a super comfortable soft-mesh back and under arms that allow all the heat that you build up to escape. About the fabric: the reflective material gives you 360 degree reflective surface so that any light from vehicles will reflect back to the driver and help you stand out in advance to give 'astonishing reflectivity'. the material is CE en 20471 certified.