Our concept for evolution tracks uses two techniques for the concertina folding :
1  the classic  method of folding using a sewn folding strip.
2  a self-adhesive extra-wide (100 mm) connecting and folding strip.

advantages of this technique:
they can be used as a mono-block track when kept in one connected stack.
they are lighter and easier to handle if you separate the elements (it is easier to transport 3 tracks of 4m than 1 of 12 m).
it is possible to construct a made-to-measure  length according to your needs.

concertina foldable tracks to make linear evolution strips, two coloured, lateral strips, velcro at the ends.
track of 2 x 2 m
foldable in two (5,5 cm thick).
dim. when folded : 200 x 100 x 11 cm.
examples :
to make a track of 10 x 1 m, you need 2
ref. 6126 and 1 ref. 6115.
to make a track of 12 x 2 m, you need 6
ref. 6124.