The cotton is breathable enough that my little one doesn’t wake up sweaty, and the quilted padding gives just the right amount of snugness for her startle reflex. She’s been sleeping two extra hours at night since we switched her out of the swaddle.
My 4-month-old finally sleeps four-hour stretches since we switched her into this. The cotton is breathable and the thick, quilted middle section gives her that snug, secure pressure she was missing from her swaddle.
That cotton is so much softer than the average sleep sack, and the quilted padding gives just enough weight that my baby actually settles down instead of fighting bedtime. It took about three nights for her to adjust, but now she's sleeping longer stretches than she ever did swaddled.