The reflective vest is especially developed for runners but work as well when walking or cycling during dark. Reflective products only save lives if they are actually being used - and while the Fluorescent Yellow gives maximum visibility in low light situations the Black version is a great way to add safety even when you prefer to fly under the radar. The vest is developed with 360 degree reflective straps to make you visible from all directions and a highly breathable mesh in a loose fit for maximum heat transfer. Features: — 360 degree visibility — Lightweight and packable — Highly breathable mesh — Loose non-restrictive fit — CE-certified — Velcro for easy attachment and size adjustment Materials: Main fabric Mesh 100% Polyester Reflective fabric 100% Polyester Size: XS-XXL (Refer to the picture for size chart)