A king size fitted sheet is a bottom sheet tailored explicitly for a standard king-size mattress (76" x 80"). Its defining feature is the integrated elastic band, typically sewn around the entire perimeter of the sheet's skirt, which allows it to stretch and contract to grip the mattress corners and sides firmly. This design eliminates the need for sheet fasteners or suspenders and provides a neat, secure fit that is resistant to coming loose. The primary function is to create a comfortable, hygienic barrier between the sleeper and the mattress, which is easily removable for washing. The quality of a fitted sheet is judged by its fabric, seam construction, and the durability of its elastic. For a king-size bed, the sheet's material must be durable enough to withstand frequent washing over a large area while maintaining its softness and color. In application, a high-quality king fitted sheet made from percale cotton offers a crisp, cool, and hotel-like feel, which is highly desirable for hot sleepers. Conversely, a sateen weave offers a warmer, silkier drape. A common consideration is the "pocket depth," which must be chosen based on the mattress's height to prevent the elastic from being overstretched or from fitting too loosely. For instance, a mattress with a 20-inch depth requires an "extra deep pocket" fitted sheet. To explore our collection of king-size fitted sheets in various fabrics and pocket depths, please contact us for detailed specifications and sizing advice.