Shower in Logan airport (BOS) or nearby
We will be arriving on a red eye flight to Boston (Alaska Airlines) and spend 12 hours in Boston before leaving again on red-eye flight to Paris (Air France) for vacation.
With 2 red-eye flights coming, we need to take a shower in Boston airport or nearby. Is there such place at the airport?
Or we need to pay for lounge use with Alaska Airlines or Air France?
Please advise. Huge thanks!