Look for 200 to 500 for cotton percale and 300 to 600 for cotton sateen.
Anything above this range is often a marketing ploy and can actually lead to less breathable, "sweaty" sheets. Choosing Your Fiber: Cotton Staple Length
Buying high-quality sheets requires looking beyond marketing buzzwords like "thread count" and focusing on three pillars: , weave type , and material transparency . The Thread Count Myth