The Decathlon Nyamba 0.5kg Fixed Weight Vinyl Dumbbells Pair in Blue are a set of two dumbbells designed for strength training and weight lifting. The dumbbells are made of vinyl material and weigh 0.5 kg each, providing a fixed weight for consistent workouts. Suitable for both men and women, these dumbbells are ideal for gym and training activities, offering a comfortable grip and reliable performance during exercises.