Do cooling weighted blankets actually sleep cool?

Mostly, but with caveats. High-trust expert reviewers report that bamboo viscose and engineered cooling fabrics do feel cool-to-the-touch and breathe better than minky or plush microfiber. However, r/WeightedBlankets and r/aspergirls users repeatedly note that any 15+ lb blanket traps some body heat by virtue of mass, and several hot sleepers report needing to layer or swap to a lighter blanket in summer regardless of marketing claims.