This wonderfully silky fiber is perfect on it's own or used for blending with other fibers.  SeaCell is about 4" long and very strong.  Here's a little bit of information on this wonderful fiber.

SeaCell®pure is a cellulose fiber containing seaweed (e.g. ascophyllum
nodosum).
The idea behind SeaCell®pure is actually quite simple: The natural raw
materials cellulose and seaweed represent the basis for the manufacture
of the SeaCell®pure fiber, employing the "Lyocell Process". The cellulose
fibers act as functional substrate for the seaweed.

– Breathable
– Soft
– Supports skin blood flow
– Stimulates skin cell regeneration
– Pleasant touch, comfortable feel

Seaweed is added as the active substance for a good reason. The fact that
this marine plant is rich in various minerals, trace elements,
carbohydrates, fats and vitamins, has been well-known since the times of
Chinese medicine. Moreover, seaweed has been proved to protect the
skin and exhibit anti-inflammatory properties, which also unfold in the
SeaCell®pure fiber.

The SeaCell®pure fiber offers the manifold properties of seaweed and its
health-promoting substances. The structure of SeaCell®pure facilitates an
active exchange of substances between fiber and skin. The natural body
moisture releases the constituents when the fabric is worn.
The effect of SeaCell®pure remains unchanged even after numerous
washing cycles.

Numerous tests, carried out by various institutes and organizations,
examined the fiber properties and confirmed the durability of the
SeaCell®pure effect.
In cooperation with the Fresenius Institute in Berlin, it was demonstrated
that, in the humid environment of the skin surface, the SeaCell®pure fiber
is able to release its active ingredients as required.
The SeaCell®pure fiber is non-cytotoxic (cytotoxic refers to the property
of substances or certain cells to destroy other cells) and hence well
tolerated by the skin. Patch tests (skin test to examine allergic reactions to
substances), carried out by Friedrich Schiller University Jena,
demonstrated that the SeaCell®pure fiber does not cause any allergic
reactions and irritations on sensitive skin.