The Proviz Reflect360 Reversible Vest aka the Switch Gilet is made from a dual-layer outer shell that can be worn either way to give you two options one for the day and one for night. By day the fluorescent yellow material enables riders to stand out and be clearly seen. By night the reflective material lights up when vehicle headlights are shined upon it enabling the user to be seen more clearly on the roads therefore enabling drivers to adapt accordingly to your position on the road.