Salomon race vest, 5 litre capacity. Model S-LAB advance skin 3. Sky blue and white. Weighs virtually nothing (ok, 225g), good for any distance and very comfortable, with pockets galore. With 2 soft flasks (which slip into chest pockets), removable bladder pouch, emergency foil blanket and whistle. About 6 months old and worn around half a dozen times, in good condition, just one small nick. About 100 new I think