Baby sleeping bag pattern

Does anybody know of any nice baby sleeping bag patterns - and how best to acheive the correct "toggage"

We've just outgrown our newborn ones and its time to grow up a size! 

Thanks
Lindsay

Sorry, but what does "toggage" mean? I'm a bit lost. 

And what style of bag are you after? Buttons, zip? Front, side, or bottom opening? Etc...

Here in the UK you can buy different weight sleeping bags for infants. a "normal" one is 2.5togs, and summer weight is 1.5. Our house is a bit on the chilly side so wanted to make sure it will be snug enough for Freya in the winter.

I'm open to styles - the easier the better as still a bit new to sewing (or rather a bit rusty - just picked it up again after 10 years)

Oh and the easier it is to get baby in and out - as ours is a real wriggler!!! 

Many thanks
Lindsay