The phrase "soft feathers" means something that is gentle, delicate, and smooth, like the feathers of a bird. It generally implies a sense of comfort and lightness.
Sentences with «soft feathers»
Once born, your baby may appear to be covered in tiny soft feathers. (pregnancymagazine.com)
The silky soft feather yarn used to make them is incredibly luxurious and crazy comfortable. (blog.guguguru.com)
Be demure in a white dress embellished with soft feathers, but style it edgy by pulling on a moto jacket. (justthedesign.com)