We've been using the happy baby sleepea swaddle and my son (10 weeks) was finally sleeping in his next to me. Our bedroom is 22 degrees so we were putting him in the swaddle naked. He always comes out of it warm sometimes hot around the swaddle band and sweaty under the arms. His forehead and back are not hot. So we've stopped as I read babies sweating is a sids risk. Sleep is once again terrible. But I'm wondering if all swaddled babies are hot under their arms when swaddled?