Ones I found great for when LO was little
https://www.amazon.co.uk/Summer-Infant-SwaddleMe-Small-Monkey/dp/B0035ER1FK/ref=sr_1_6?ie=UTF8&qid=1301755348&sr=8-6
Then, as he got bigger I used
https://www.amazon.co.uk/Halo-Sleepsack-Swaddle-Fleece-Months/dp/B001D4951C/ref=sr_1_2?s=baby&ie=UTF8&qid=1301755406&sr=1-2
The second has been great, I've gone from both arms in, to one in one out, then both out but with the swaddle around his tummy, to no swaddle at all. Now he can sleep in a regular sleeping bag.