Soft Cotton King Size Sheets

Shop Soft Cotton King Size Sheets at Mattress Firm to explore bedding options for your king size mattress. Browse available styles, colors and designs to find sheets that suit your bedroom and bedding preferences.

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Sleepy's Signature Flannel Sheet Set

Starting at

$139⁹⁹

Lusome Temperature Regulating Sheets

Starting at

$358⁰⁰

Temperature

Allerease Ultimate Mattress Protector

337

Starting at

$49⁹⁹

Temperature
Allergies

Rest Evercool Sheet Set

308

Starting at

$279⁰⁰

Temperature
Allergies

Cozy Earth Bamboo Sheet Set

9709

Starting at

$328⁰⁰

Temperature

Rest Evercool Bedding Bundle

Starting at

$289⁰⁰

Temperature
Allergies

Sleepy's Signature Cotton Percale Quilt Set

Starting at

$223⁹⁹

$279⁹⁹

$56 OFF

Sleepy's Signature Diamond Washed Cotton Quilt Set

Starting at

$303⁹⁹

$379⁹⁹

$76 OFF

Soft cotton king size sheets bring breathable comfort, a smooth feel and dependable everyday performance to your bedroom. Made with natural cotton fibers, these king sheets help promote airflow so you can stay more comfortable throughout the night, while their soft texture creates a cozy layer between you and your mattress. Look for high-quality cotton king size sheets in breathable percale for a crisp, cool feel or smooth sateen for a silkier, warmer finish. Cotton jersey sheets offer a relaxed, T-shirt-like feel, while long-staple cotton can provide enhanced softness and durability. Choosing the right cotton weave and finish makes it easier to find king size bedding that matches your preferred sleep environment and comfort level. The best soft cotton king size sheets combine a comfortable feel with a secure fit and easy care. Check the pocket depth before you buy to ensure your fitted king sheet can accommodate your mattress, mattress protector and any compatible topper without slipping off during the night. A fully elasticized fitted sheet can help maintain a neat fit, while a generous flat sheet adds comfortable coverage for couples and larger mattresses. For lasting softness, follow the care instructions, wash cotton sheets in cool or warm water and avoid excessive heat that may weaken fibers over time. With breathable construction, a comfortable fit and a style that complements your bedroom, cotton king size sheets can help create the welcoming sleep space you need to get better zzz's.

What makes cotton sheets feel soft? + -

Softness can come from the cotton fiber, the weave and the finishing process. Combed or long-staple cotton is often valued for its smooth feel, while percale and sateen weaves create distinct textures.

What is the difference between percale and sateen cotton sheets? + -

Percale has a crisp, breathable feel created by a one-over, one-under weave. Sateen uses a different weave that gives the fabric a smoother, silkier hand and a subtle sheen.

Does a higher thread count always mean softer cotton sheets? + -

Not necessarily. Softness also depends on the quality and length of the cotton fibers, the type of yarn and the weave. A well-made sheet with a moderate thread count can feel softer than one with a higher count.

How should cotton sheets be washed and dried? + -

Follow the care label, then wash cotton sheets with like colors using a gentle or regular cycle. Avoid overloading the washer, use mild detergent and tumble dry on low or line dry when possible.

How can I keep cotton sheets feeling soft over time? + -

Wash them according to the care label, avoid using too much detergent and skip fabric softener if it leaves a coating on the fibers. Removing sheets promptly from the dryer can also help reduce wrinkles.