Fiber content: 50% cotton, 50% acrylic.
Also on yarn label:
“Do not bleach.”
“Use cool iron.”
“May be commercially dry-cleaned.”
(Imported by Westminster Fibers (USA).)

The Sassafras construction is complex, because it is not strictly woven, but not plied, either: It is unique. The process involves at least 2-3 stages:

1. The solid-color tape is very loosely woven on the outside, but inside there is a single thread folded accordion-style for the length of the tape. If you pull the inner thread, it unravels in a continuous, never-ending zigzag of thread that does not pull the threads in the outer woven layer of the tape. Then
2. The (filled) woven tape is over-bound (wound around the tape with no tension yet lies flat; not loose) with a single, multicolored thread that changes color like long-striping yarn. In the aqua colorway of Sassafras, for example, the winding thread contains aqua and 3 contrast colors (CCs): lavender, orange, and lime green. (Whether this winding thread contains the same colors in all Sassafras colorways is unknown.) But this is only part of the construction story.

The WAY the single long-striping thread is wound around the tape also varies--in two distinct ways: uniformly and randomly.

1. Most of the tape (length) is uniformly wound diagonally every 1 cm, lengths varying from about 38cm-41cm or 79cm or 157-159cm, each length separated by
2. A tightly wound section (threads close together, perpendicular to the tape, not diagonal, so there is little space between the thread) for about 3-4 cm. These 3-4cm patches of CC thread cover most (but not all) of the solid-color tape yarn. From a distance, the CC thread patches look almost like neps in tweed, but close-up, it’s obvious that the CCs come from the over-wrapped thread. The randomness of the CCs,
3. The spacing between diagonal loosely spaced sections and perpendicular tightly wound sections also varies.

All together, these multiple variations in the way the thread wraps the tape--plus the unique construction of the tape itself--make this a very unique and appealing tape yarn.