Adjustable Bed Sheets
Fitted Sheets for 18-Inch Mattresses: Top Picks
7 picks compared
6 min read
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The short answerFor an 18-inch adjustable mattress, the Brooklyn Bedding Deep Pocket Sheet Set, Mellanni Deep Pocket Sheets, and CGK Unlimited Deep Pocket Sheets are top choices. They offer deep pockets and secure fit.
?How we pickedWe compare published specifications, safety certifications and thousands of verified owner reviews, and we do not physically test every unit. Read the full process in our review methodology.
Brooklyn Bedding Deep Pocket Sheet Set
★★★★★ 4.7 / 5 Best Overall
This set has a 22-inch pocket depth, easily covering 18-inch mattresses. The brushed microfiber is soft and breathable. Owners report the elastic all around keeps it snug on adjustable bases.
Pocket Depth 22 inchesMaterial MicrofiberThread Count Not specifiedIncludes Fitted sheet, flat sheet, 2 pillowcases
- Deep pockets fit 18-inch mattresses
- Soft and breathable fabric
- Elastic all around for secure fit
- May be too deep for thinner mattresses
- Microfiber may trap heat for some
Mellanni Deep Pocket Sheets
★★★★★ 4.6 / 5 Best Value
Mellanni offers a 21-inch pocket depth at a budget-friendly price. The microfiber material resists wrinkles and fading. Many owners say they stay put on adjustable beds.
Pocket Depth 21 inchesMaterial MicrofiberThread Count Not specifiedIncludes Fitted sheet, flat sheet, 2 pillowcases
- Great price for deep pockets
- Wrinkle-resistant
- Colorfast and durable
- Not as thick as some premium options
- May slide on very slick mattresses
CGK Unlimited Deep Pocket Sheets
★★★★★ 4.5 / 5 Best Budget
CGK Unlimited provides an 24-inch pocket depth, one of the deepest available. The microfiber is lightweight yet sturdy. Budget-conscious buyers get a reliable fit for thick mattresses.
Pocket Depth 24 inchesMaterial MicrofiberThread Count Not specifiedIncludes Fitted sheet, flat sheet, 2 pillowcases
- Extra deep pockets
- Very affordable
- Soft and comfortable
- Thin fabric
- May pill after washing
Utopia Bedding Deep Pocket Sheets
★★★★★ 4.4 / 5 Best for Hot Sleepers
Utopia Bedding uses brushed microfiber that wicks moisture. The 21-inch pocket depth fits 18-inch mattresses well. Owners appreciate the cool feel and secure fit on adjustable bases.
Pocket Depth 21 inchesMaterial MicrofiberThread Count Not specifiedIncludes Fitted sheet, flat sheet, 2 pillowcases
- Breathable and cooling
- Deep pockets
- Elastic all around
- May not fit extra-thick toppers
- Some report color fading
Best for: Best for Hot Sleepers
Bare Home Deep Pocket Sheets
★★★★★ 4.6 / 5 Best for Adjustable Beds
Bare Home sheets have a 22-inch pocket and a stretchy knit fabric. The elastic band is reinforced for extra hold. Users say they stay tight even when the bed is raised.
Pocket Depth 22 inchesMaterial MicrofiberThread Count Not specifiedIncludes Fitted sheet, flat sheet, 2 pillowcases
- Stretchy fabric moves with bed
- Reinforced elastic
- Soft and durable
- Limited color options
- May be too warm for some
Best for: Best for Adjustable Beds
Southshore Fine Bedding Deep Pocket Sheets
★★★★★ 4.3 / 5 Best for Thick Mattresses
Southshore offers a 23-inch pocket depth, ideal for mattresses with toppers. The microfiber is thick and plush. Owners report a snug fit without excess bunching.
Pocket Depth 23 inchesMaterial MicrofiberThread Count Not specifiedIncludes Fitted sheet, flat sheet, 2 pillowcases
- Extra deep to fit toppers
- Thick and soft
- Secure elastic
- Heavier fabric
- May be too deep for standard mattresses
Best for: Best for Thick Mattresses
Elegant Comfort Deep Pocket Sheets
★★★★★ 4.4 / 5 Best for Luxury Feel
Elegant Comfort uses a double-brushed microfiber for a silky feel. The 21-inch pocket depth fits 18-inch mattresses. Owners love the luxurious texture and secure fit.
Pocket Depth 21 inchesMaterial MicrofiberThread Count Not specifiedIncludes Fitted sheet, flat sheet, 2 pillowcases
- Silky smooth texture
- Deep pockets
- Wrinkle-resistant
- May slide on smooth surfaces
- Not as breathable as cotton
Best for: Best for Luxury Feel
We compared specs like pocket depth, fabric, and grip features. Owner feedback on fit and durability guided our picks.
What to Look For
Pocket depth matters most for 18-inch mattresses. Standard deep pockets are often 15 to 18 inches, which may not fit. Look for a pocket depth of at least 21 inches. Check the elastic: a full perimeter elastic band holds better on adjustable beds. Fabric type affects comfort and durability. Microfiber is common and affordable, but cotton is more breathable. Consider the weave and weight for your climate.
Adjustable Bed Compatibility
Adjustable beds move and flex, so sheets need to stay put. A fitted sheet with a deep pocket and strong elastic is essential. Some sheets have additional straps or grippers. These help keep the sheet from slipping when the head or foot is raised. Look for sheets with a stretchy fabric that moves with the bed. Avoid sheets that are too tight, as they may pop off.
Material Choices
Microfiber is the most popular for deep pocket sheets. It is soft, durable, and resists wrinkles. However, it can trap heat. Cotton sheets are more breathable but may not have deep pockets. Bamboo and Tencel are cooling options, but they are pricier. Consider your sleeping temperature and budget. For hot sleepers, look for moisture-wicking or cooling technologies.
Care and Maintenance
Deep pocket sheets require proper care to maintain fit. Wash in cold water and tumble dry on low. Avoid high heat, which can shrink the fabric. Remove promptly from the dryer to reduce wrinkles. Some sheets are wrinkle-resistant, but others need ironing. Follow the care label for best results. Proper care extends the life of the elastic and fabric.
Questions people ask
What is the best fitted sheet for an 18-inch mattress?
The Brooklyn Bedding Deep Pocket Sheet Set is a top choice. It has a 22-inch pocket depth and a secure elastic fit.
How deep should pockets be for an 18-inch mattress?
Look for a pocket depth of at least 21 inches. This ensures the sheet covers the mattress and stays tucked.
Can I use regular deep pocket sheets on an 18-inch mattress?
Regular deep pockets are often 15 to 18 inches, which may be too shallow. They can slip off. Choose sheets with a pocket depth of 21 inches or more.
Do adjustable beds require special sheets?
Not necessarily, but sheets with deep pockets and strong elastic work best. They stay put when the bed moves.
What is the difference between microfiber and cotton sheets?
Microfiber is softer and more affordable, but less breathable. Cotton is breathable and natural, but may not have deep pockets.
Are deep pocket sheets worth it?
Yes, if you have a thick mattress. They prevent the sheet from popping off and keep the bed looking neat.
Can I use a mattress topper with deep pocket sheets?
Yes, but you need extra deep pockets. Consider a pocket depth of 23 inches or more to accommodate the topper.
How do I keep fitted sheets from slipping on an adjustable bed?
Use sheets with a full elastic band and consider sheet straps. These add extra grip and keep the sheet in place.
The bottom lineSo which one?
For an 18-inch adjustable mattress, prioritize deep pockets and a secure fit. The Brooklyn Bedding set offers the best overall balance. Budget buyers can rely on CGK Unlimited, while hot sleepers should consider Utopia Bedding.
