Bought new, wore 3x. This vest is amazing! I have it in size small and XS. Selling the small because I wear my XS more. Listing includes size small vest and insulated sleeve. Designed and fine-tuned for demanding endurance races and runners, ADV SKIN 12 ensures on-the-go access to hydration, long-distance comfort and freedom of movement. With an ultra versatile storage unit and up to 12L capacity, it’s ideal for longer distance races or adventures. Best for Trail running, Versatility Volume: 12 liters Weight: 293 g Activities Bags: Trail running Dimensions: 40 x 19 x 1 L x W x D in cm Weight including accessories: 367 grams