Generally speaking, the higher the thread count, the softer and more durable the bedsheet will be. However, it's worth noting that thread count is not the only indicator of quality. Other factors, such as the type of bedsheet material used and the weaving technique, also play a role in determining the overall feel and performance of the bedsheet.
However, the one aspect of fit you may want to consider is pocket depth. Fitted sheets can vary in how deep the pockets are, since mattress heights are not standardized like length and width. If your mattress is more than 10 inches tall, you may want to consider looking specifically for deep-pocket fitted sheets. We recommend the pockets be a few inches larger than the height of your bed — if your bed is 15 inches tall, look for 16 to 17 inch pockets.
And finally, brushed cotton is for those looking for something in the middle in terms of cooling/heat-retaining qualities. To turn cotton into brushed cotton, the fabric undergoes a couple of extra treatments that result in the softest flannel-like bedlinen. While both percale and sateen sheets may take a few washes to become more supple and soft, a new set of brushed cotton bedding feels like you’ve slept in it forever. It is a great year-round option because it won’t warm or cool you down excessively.