Beginning at heel with RS facing, use the spare circular needle to pick up
the top loops of the last ridge of garter st around outer edge of slipper
sole. (Image 1)
Check that you have 79 (85, 91 / 97, 103) loops on the spare needle. Follow
joining instructions below for your choice of styles.
Shown on teal clog and also used on the brown clog.
Always use this join if suede soles will be added later.
Place working needle holding the outer sole over the outside of spare
needle holding the loops of the inner sole. (Image 2)
Hold both needles in your left hand. With the bottom of outer sole facing
and beginning at heel, knit the soles together and cast off at the same
time, as for cuff.