Peekaru Hoodie: fits over any soft baby carrier, including Baby Bjorn and Ergo, as well as a variety of mei tais, ring slings, and wraps. The Peekaru Hoodie is comfortable for temperatures from 45 – 65 F.
DIY Pouch Baby Sling Tutorial ~ This baby pouch is not adjustable like a ring sling, but instead is fitted for the wearer. The original post also provides a link where you can get measuring instructions and the sewing pattern. also has online fabric sites