Colour: Hi-Vis Yellow Size: One Size. Code: UTBC4187.This product has 5, colours. This may vary depending on availability. You can find the other colors on Atlas For Men searching the product code:UTBC4187. Pack of 2 Suitable for most (20 - 40) litre rucksacks enhancing visibility in all kinds of environment Front mesh pocket Elasticated edging with simple fixing fasteners Two vertical reflective strips All colours are 100% waterproof except the Yellow/Orange two-tone covers (not waterproof) Fabric: 100% Polyester Yoko International - a comprehensive range of great value, high visibility, safety garments Yoko Knapsack Visibility Enhancing Cover (Pack of 2) (Hi-Vis Yellow) (One Size) - UTBC4187