Confessing their sins (ἐξομολογούμενοι τὰς ἁμαρτίας αὐτῶν)
The words imply: 1. That confession was connected with baptism. They were baptized while in the act of confessing. 2. An open confession, not a private one to John (ἐξ, compare Act 19:18; Jam 5:16). 3. An individual confession; possibly a specific one. (See Luk 3:10-15.)