Bamboo vs TENCEL Sheets

No, but they are closer relatives than the marketing implies. Both are regenerated cellulose fibers: plant pulp dissolved into a liquid and spun back out as thread. The differences are the plant, the solvent process and the label. TENCEL is Lenzing's brand name for its lyocell and modal fibers, usually made from eucalyptus and spun in a closed-loop solvent process that recovers most of the solvent for reuse. Sheets sold as bamboo are almost always viscose rayon, made with harsher chemistry and from bamboo pulp. Confusingly, bamboo lyocell also exists - when you see it, the lyocell word is telling you about the process and the bamboo word is telling you about the plant.

Because under US textile labeling rules a fabric has to be named for the fiber it actually is, and rayon is rayon regardless of what plant the pulp came from. Calling a rayon sheet "bamboo" implies the natural plant's properties survived a process that dissolved it, which the FTC treats as deceptive - it has published guidance on the point and has brought enforcement actions against major retailers for bamboo marketing. The practical upshot for a shopper is useful: a listing that says "rayon from bamboo" or "bamboo viscose" is following the rule, and a listing that just says "100% bamboo" either does not know the rule or is ignoring it.

They feel similar to the hand and neither is as cool as a cotton percale over a whole night. Both lyocell and viscose are smooth, dense, drapey fibers that conduct heat away from your skin on contact - which is the cool-to-the-touch sensation both categories advertise. What that does not tell you is all-night airflow, and a loose, plain-woven cotton percale moves more air than either. Lyocell has a small real advantage in moisture: it absorbs and releases moisture well, so it feels less clammy as the night goes on. If heat is your main problem, read our cooling sheets page rather than choosing between these two.

Lyocell, generally - and the reason is wet strength. Both fibers lose strength when wet, which is why neither likes hot washing, but lyocell retains noticeably more of its dry strength than viscose does. In practice that means a TENCEL sheet tolerates regular laundering better, while a cheap bamboo viscose sheet tends to thin and tear at the stress points first. Neither will outlast a good long-staple cotton percale. Wash both cool, on a gentle cycle, and skip the fabric softener - it coats the fiber and kills the slip you paid for.

Lyocell's process is the better documented of the two, and that is as far as we will go. Closed-loop lyocell production recovers and reuses the great majority of its solvent, and branded TENCEL fiber comes with wood-sourcing certification you can look up - the Sijo set here names PEFC-certified forests, for example. Viscose production uses carbon disulfide and is far less transparent at the sheet-listing level; essentially no bamboo sheet listing tells you where it was spun or how the effluent was handled. Note what neither claim covers: the organic label on a bamboo sheet describes how the plant was grown, not the chemistry that turned it into thread.

If you want a documented fiber at a normal price, buy branded TENCEL - the Amelie Home set is the value route and the Sijo set is the fully certified one. If you want the silky feel for the least money and the paperwork does not matter to you, a correctly labeled bamboo viscose is a perfectly good sheet, and the Cariloha is the better-certified one of the two here. What we would not do is pay a premium for a sheet that calls itself bamboo without saying viscose or rayon: that is the one combination where you are paying extra for a word the regulator has already ruled on.