Sure, why not, if your dog doesn’t mind. The harness was designed to be ergonomic and suit your dog. If the dog is well-used to a harness, let him be.
Some owners just take the harness of the dog right before bedtime and put it back on the dog the first thing in the morning. Just be careful if your dog develops a taste for chewing the harness because it can get pretty damaged and less secure. Also, never leave your dog unattended with the harness on.