Are bamboo viscose sheets actually cooling?

Mainstream tech press and brand-side reviewers describe bamboo viscose as soft and temperature-regulating, but specialist community threads are more skeptical, with some long-term users reporting that bamboo sheets feel no cooler — and sometimes warmer — than good percale after multiple washes. The honest answer is that results vary by sleeper, and percale or linen tend to get more consistent praise from heat-sensitive users.