The fabric you sleep on determines how quickly heat moves away from your body. Each material below has a different mechanism — bamboo absorbs and releases moisture, eucalyptus Tencel wicks and dries fast, linen traps almost no heat, silk provides contact cooling without moisture management, and percale cotton balances breathability with durability.
Bamboo
Bamboo-derived fabrics (bamboo viscose or bamboo lyocell) are soft, moisture-absorbent, and naturally temperature-regulating. They suit hot sleepers who also sweat. See the full bamboo guide.
Cotton Types
Percale weave is crisper and cooler than sateen. Thread count above 400 often reduces airflow. Long-staple cotton (Egyptian, Pima) is more durable but not inherently cooler. Full breakdown in cotton types guide.
Eucalyptus Tencel
Tencel Lyocell from eucalyptus pulp is smoother than bamboo, wicks faster, and dries in under 60 minutes. Strong choice for humid climates. See eucalyptus Tencel guide.
Linen
Linen is the most breathable natural fiber. It improves after washing, feels slightly rougher initially, and keeps surface temperature consistently low. Best for warm-climate sleepers who prefer texture. See linen guide.
Silk
Silk provides instant contact cooling but minimal moisture management. It is a luxury option with limited practical advantage over eucalyptus Tencel in hot conditions. See silk guide.
Merino Wool
Merino wool is counterintuitive for cooling but effective in variable climates. It regulates temperature bidirectionally — absorbs moisture and releases it slowly to prevent clamminess. See merino wool guide.
For context on how materials interact with technology, see phase change materials and moisture-wicking mechanics.