Kylie Jenner Not Wearing a Seat Belt ... Or a Bra!!

4/29/2017 2:27 PM PDT

Now we know how Kylie Jenner likes to ride on the weekends ... free and easy.

Kylie posted an eye-popping underboob pic from her car on Saturday, showing her wardrobe choice for the day is a loose hoodie, tube top ... and definitely no bra.

Hopefully she buckled up before she took off -- that looks dangerous.