Natural ultraviolet rays from the sun react with fluorescent materials within this garment, making them appear brighter and as a result increasing visibility during the day. The effect is stronger in low light conditions such as wet weather and fog. COLOR: Fluo Yellow FEATURES: • Breathable mesh lining • Elasticated hem • Rubberised grip material on the lower back • Printed reflective details for increased nighttime visibility • Ergonomically shaped side panels • Packable- Space-saving, packs down neatly into its own pocket