After the Halo SleepSack and before we discovered the Big Kid's SleepSack, we were constantly checking up on Josh to make sure that his blanket stays on. Josh (and Zoe, too!) is forever kicking off his blanket. We used to tuck the ends of the blanket under the mattress so that it would be difficult for him to squirm out from under, but no dice. Then, when I was recommending the Halo SleepSack to a friend and I wanted to send her a link to the website, I saw that that they came out with the Big Kid's SleepSack! I just had to get one.
What's different about the Big Kid's SleepSack is that your kid's feet are actually out. This is great for the older kids because they can still walk about without tripping (e.g. if they need to go to the bath room in the middle of the night). I got the 4T-5T for Josh and in the photo above (taken when he was 3yo), the SleepSack was a bit big for him still, but he could wear it with no problem. There are (how can I accurately describe them?) "bands" around the ankles -sort of like in some track pants, -- that keep the material from sliding past the ankles.
I wish some stores would carry the Halo line here. With Halo SleepSack, I had to get my sister-in-law to buy them from a specialty store in Toronto. With the Big Kid's SleepSack, I ordered from Amazon.com. It's actually much cheaper to order from Amazon.com than to order from the Halo website.
If you know of anybody who "makes" or sells something similar to the Big Kid's SleepSack here in Hong Kong, do let me know. I'd love to get a couple more.