A floating floor system includes a plurality of interlocking floor panels (101), each including a base layer (104) formed from a first material having a first hardness; a body (102) formed from the base layer and having a top surface (103) and a bottom surface (105); a first locking edge portion (175) formed from the base layer and including a locking channel (201) defined by a channel floor (207) and first and second channel sidewalls (203, 205) extending upward from the channel floor toward the top surface; a second locking edge portion (167) formed from the base layer and including a locking ridge (189) protruding downward away from an upper surface of the second locking edge portion and defined by a ridge surface (191) and first and second ridge sidewalls (193, 194); wherein at least one of the sidewalls includes a portion formed from a second material (217, 219) having a second hardness that is less than the first hardness.