In order to understand more, I ordered a pair of slippers on the internet with a german Etsy seller.Trying to unravel the secret of lapti shoe making, by literally unraveling a slipper.It did not help

WHY NOT STUDY 3D WEAVING TROUGH SHOE WEAVING TECHNIQUES.IN RUSSIA YOU FIND LAPTI SHOES MADE OF BIRCH BARK.VERY SIMILAR ARE THE KARELIA SHOES FROM FINLAND.THEY WERE ALSO CALLED 6 MILES SHOES, FOR THE DISTANCE THEY LAST.
MATERIAL: BIRCH BARK
TECHNIQUE: 3D WEAVING

WORKSHOP 3D WEAVING WITH ADRIANUS KUNDERT AT TEXTILE MUSEUM TILBUG.
MATERIAL: PAPERLEATHER

Important information is the book his reasearch was based on:
"the art paper weaving" https://www.amazon.com/Art-Paper-Weaving-Dimensional-Projects/dp/1631590391
Unfortunately I ordered this as E-reader book at Bol.com because I refuse to order at Amazon !!!

So the next step was to try to understand trough Youtube tutorials.All the tutorials on youtube on Lapti shoes are in Russian.On Keralia/Finland I cold not find any tutorials on how to make them.
In 3 youtubes I found, the technique is different every time.
Still wondering if we need some translational help.

The first trial was made with solid woven polyester tape and following the tutorial, starting with 8 ends tied around my leg

Then it was time to go back to the slippers I bought, to see if it was possible to copy them now, after some acquainted insight trough exercise

2Some trials later.A shoe,a boot,a cube.....

Starting with 7 ends as warp and 4 rows of weft.The last result is a closed slipper, looking somehow like the Karelia shoe.
Quite amazing that you can make a shoe without any sewing.
As for assembly/dissasembly technique this is very suitable.

Foound this amazing stiff tape, feels ike strached. Uitl now most similar to origanal birch bark.
I added 1 colores strips, in order to have that sporty brided rope feeling. Also to see clezrly the directions the strips go.
Prior to starting to weave, I made a scheme for the length of the strips, measuring it from the last trial. I didn't really help that much.Making a shoe is a good exercise for making rahter complex shapes.

In Russian, they are called lapti (лапти, sing. лапоть, lapot); this word is used as a derogatory term for cheap and short-lived footwear and, in the form lapotnik (лапотник), for an uneducated person, notionally one who is too poor to afford good shoes and wears bast shoes instead.[2]