kicking off the covers

Rebecca • I live in the uk....twins due in a few weeks 😊
One of my 3 week old boys is terrible for kicking off his covers at night, he is too small for his sleeping bag yet so I was wonder if anyone had any tips on keeping him covered, I tuck him in and it's off instantly I've swaddled him and he wriggles out...the house isn't cold but he does need covers as he gets a bit cold because he is still little....any ideas?