Field guides

Is it plastic?

Short, honest answers about what fabrics actually are — the same knowledge the extension applies automatically.

Plastic

Is polyester plastic?

Yes — polyester is plastic. Chemically, it is PET, the same polymer used to make soda bottles, spun into thread.

Plastic

Is nylon plastic?

Yes — nylon is plastic. It was the first fully synthetic fiber ever made, a polyamide polymer derived from crude oil.

Plastic

Is acrylic fabric plastic?

Yes — acrylic is plastic, and among the worst microfiber shedders of any fabric. Think of it as plastic imitation wool.

Plastic

Is spandex plastic?

Yes — spandex, elastane, and Lycra are all the same polyurethane-based plastic fiber. It is in almost everything with stretch.

Plastic

Is fleece plastic?

Yes — fleece is almost always 100% polyester brushed into a pile. It is one of the highest-shedding fabrics you can own.

Plastic

Is faux (vegan) leather plastic?

Yes — faux leather is a plastic film (polyurethane or PVC) laminated onto a fabric backing. “Vegan leather” is nearly always the same thing.

Not plastic

Is viscose (rayon) plastic?

No — viscose is not plastic. It is regenerated plant cellulose, so it biodegrades. Its issues are chemical processing and forest sourcing, not petroleum.

Not plastic

Is lyocell plastic?

No — lyocell is regenerated wood cellulose made in a closed-loop process. It is the cleanest of the semi-synthetic fibers.

It’s complicated

Is acetate plastic?

Partly — acetate is a bioplastic made from plant cellulose that has been chemically converted into a thermoplastic. It melts like plastic but starts as wood pulp.

Plastic

Is recycled polyester (rPET) still plastic?

Yes — recycled polyester is chemically identical to virgin polyester. Better feedstock, same fiber, same microplastic shedding.

Plastic

Is microfiber plastic?

Yes — microfiber is ultra-fine polyester and nylon. The fineness that makes it grippy and absorbent also makes it shed heavily.

Not plastic

Is cotton plastic-free?

Cotton contains no plastic — it is pure plant cellulose. Watch for the elastane hiding in the blend, though.

Not plastic

Is wool plastic-free?

Wool contains no plastic — it is keratin protein, the same stuff as hair. It is also the most technical natural fiber you can buy.

Not plastic

Is linen plastic-free?

Linen contains no plastic. Flax needs little water and no irrigation in the right climates — one of the lowest-impact fabrics ever made.

It’s complicated

Which fabrics shed the most microplastics?

Synthetic fabrics shed plastic microfibers every wash. Acrylic and fleece shed most; tightly woven synthetics shed least; natural fibers shed cellulose, not plastic.