My DS will be 9 months old on the 13th and I'm still wrapping him in a cot sheet at night. I just went out this week and bought three HUGE (121cmx121cm) muslin wraps in case he doesn't wean off being wrapped before it gets hot. We don't have air conditioning in our house so I have also purchased some singlet bodysuits to sleep him in, or if it gets really bad he can sleep in just a nappy and a wrap. I don't worry too much about him over heating as he tends to pull his arms out in his sleep. Sometimes it wakes him up and sometimes it doesn't - it just depends. I will continue to wrap him as long as he seems to need it and as long as he sleeps better when he is wrapped. Despite being 9 months old he does still startle in his sleep and therefore I feel he needs it. We shall see what happens over the next few months...