The flight attendants at Ryanair, a usually no-frills airline, have posed in racy outfits for their annual charity calendar, which is coming out this year at the same time that the carrier is attempting to makeover their image, according to USA Today.

Ryanair is hoping to raise about $138,000 from sales of the calendar. The proceeds from the sales will go to the Teenage Cancer Trust, a charity based in the United Kingdom.

In addition to the calendar, Ryanair has released a behind the scenes video that shows the making of the 2014 calendar.

The calendar is for sale on flights at the cost of about $14. It's also available online for the same price plus shipping and handling. However, the calendar is only available online to those in European countries covered by Ryanair's route map.

The calendar is coinciding with the carrier trying to adopt a friendlier approach towards its passengers. The carrier is no-frills, but has become known for an indifferent, and even hostile, attitude towards its passengers. The reputation has been propagated by the company's CEO, Michael O'Leary, who has threatened to add pay toilets to planes and has referred to passengers as "idiots" for complaining about fees that can reach hundreds of dollars.

Last month, however, O'Leary suggested that the carrier might be helped by an image makeover. Ryanair then announced "a raft of improvements aimed at enhancing its reputation following criticism over additional charges and strict baggage rules."

Additionally, the boarding pass fee will be cut from approximately $123 to about $24. The fee is charged to passengers who arrive at the airport without a boarding pass and have to get it printed in the airport. Other fees that are being cut include the charge to check luggage, which is being cut from about $90 to about $45. The airline is also introducing a 24-hour grace period when passengers can correct minor errors, such as spelling mistakes, without being charged a fee.

Behind-the-scenes of the calendar shoot.