The Izmi baby wrap is a snug fitting two way stretchy wrap that is perfect for smaller babies
Here is Rosie's video with a baby (focusing on avoiding slumping) and Here is Rosie's slower video with a doll reminding you how to put the wrap on safely and well - there are more videos listed on the Sling Surgery main website.
You can find out stretchy wrap photo tutorial here
There are more videos and photo tutorials listed on the Carrying Matters website.
The Sheffield Sling Surgery website is here - full of useful information about safety, all sorts of articles about warm/cold weather carrying. knee to knee support, big kid carrying and so on
Facebook page is here and the online support group the Virtual Sling Surgery is here