Archived link no longer hosts the pictures of construction, however, the pattern is still available. Utilize the link below where the author has provided a video of the folding technique.

U.S. size 9 knitting needles

Wool yarn in 3 different colors
PT2 yarn from Norway
180yrds/165m (1.75oz/50g)
(but you can use any wool yarn that will felt)

Gauge: 22 stitches equals 10cm on a size 9 (US) needle

Gauge is not given for this pattern, however, pattern adjustments for different shoe sizes are.

If you have trouble figuring out how to fold these slippers, the pattern author has provided a video on YouTube to demonstrate the fold.