Blackrock XL Yellow Hi Vis Vest, High Viz Vests, Hi-Vis Jackets, High Visibility, Safety Vest, Reflective, Hivisible PPE. Available in a range of colours and sizes S-6XL, Blackrocks best selling Sleeveless Hi Vis Vest is lightweight and comfortable to wear with 2 bands and 2 braces of reflective tape to ensure you are seen. It features a hook and loop closure for easy putting on and removal. Ref: UTTL549