same as otter and CSWS - the tighter the better, Joey's always been swaddled - the hospital showed me how to do it and i've jsut carried it on, in the winter (ist born in feb/march v cold here) he was having a thick fleecy blanket, now he has either a thin cotton summer blanket (v v thin no more than a sheet really) with a vest if it's not too bad, or a cellular blanket (only once) with no vest only a nappy on, and also the fan.
without being swaddled he keeps him self away with his arms flapping, we've tried to get him asleep a couple of times with one arm out but it doesn't last for v long. swaddled he'll have lovely naps and sleep and he seems to know it's bed/nap time when we do that.