Discloses a soft tissue filler composition comprising: (1) a crosslinked hyaluronic acid (HA) component comprising a crosslinked mixture of (i) a first, low molecular weight HA material having a weight average molecular weight of between 0.20 about MDa and about 0.99 MDa and (ii) a second high molecular weight HA material having a weight average molecular weight of between about 1.0 MDa and about 4.0 MDa； wherein the weight average molecular weight of the second, high molecular weight HA material is at least twice that of the first, low molecular weight HA material； wherein the HA materials are hyaluronic acid or one or more salts thereof； wherein the crosslinked HA component has a HA concentration of between about 15.0 mg/g and about 20.0 mg/g； and wherein the crosslinking is achieved by use of a crosslinking agent； and (2) an uncrosslinked HA component which is HA or a salt thereof, and which has a weight average molecular weight of at least about 1.0 MDa and is present in the composition in an amount of less than about 5.0% w/w.
