Adjustable Bed Sheets
Best Sheets for 18 Inch Adjustable Mattress: Top Picks
7 picks compared
6 min read
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The short answerFor an 18-inch adjustable mattress, the CGK Unlimited 18 Inch Deep Pocket Sheets lead for fit. The Mellanni Adjustable Bed Sheets excel in stretch and comfort. The Southshore Fine Linens 18 Inch Deep Pocket are a solid budget pick.
?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.
CGK Unlimited 18 Inch Deep Pocket Sheets
★★★★★ 4.6 / 5 best overall
These sheets are specifically designed for 18-inch mattresses, with a pocket depth that accommodates the extra height. The fitted sheet has a full elastic perimeter to keep it snug. Owners report they stay in place even when the bed is adjusted.
Pocket Depth 18 inchesMaterial MicrofiberThread Count Not specifiedAvailable Sizes Twin to California King
- True 18-inch pocket
- Full elastic bottom
- Wrinkle-resistant
- May be too deep for standard mattresses
Mellanni Adjustable Bed Sheets
★★★★★ 4.5 / 5 best stretch fit
Made from a stretchy knit fabric, these sheets move with the adjustable base. The fitted sheet has deep pockets and a secure elastic band. They are soft and breathable, ideal for all seasons.
Material Jersey knit (polyester/spandex)Pocket Depth Up to 18 inchesStretch 4-way stretchCare Machine washable
- Excellent stretch
- Soft and breathable
- Stays put when adjusted
Best for: best stretch fit
Southshore Fine Linens 18 Inch Deep Pocket Sheets
★★★★★ 4.4 / 5 best value
These sheets offer a generous 18-inch pocket at a budget-friendly price. The brushed microfiber is soft and durable. They come in a wide range of colors.
Pocket Depth 18 inchesMaterial MicrofiberWeave BrushedSizes Twin, Full, Queen, King, Cal King
- Budget-friendly
- True 18-inch depth
- Soft brushed feel
- Thinner fabric
- May slide on very thick bases
Utopia Bedding Deep Pocket Sheets (18 Inch)
★★★★★ 4.3 / 5 best budget
Utopia Bedding offers an affordable option with a 15-inch pocket, but the stretchy fabric can accommodate up to 18 inches. The fitted sheet has a strong elastic all around. It's a practical choice for those on a tight budget.
Pocket Depth 15 inches (stretches to 18)Material MicrofiberElastic All-aroundSizes Twin to King
- Very affordable
- Stretchy fit
- Easy care
- May not fit as snugly as true 18-inch pockets
Bedsure 18 Inch Deep Pocket Sheets
★★★★★ 4.5 / 5 best for softness
Bedsure's sheets are known for their extra soft, brushed microfiber. The 18-inch pocket fits thick mattresses and adjustable bases. They are wrinkle-resistant and fade-resistant.
Pocket Depth 18 inchesMaterial MicrofiberSoftness Extra soft brushedSizes Twin, Full, Queen, King, Cal King
- Very soft
- Deep pockets
- Colorfast
Best for: best for softness
Mellanni Deep Pocket Sheets (18 Inch)
★★★★★ 4.4 / 5 best for hot sleepers
These sheets are made from a cooling microfiber that wicks moisture. The 18-inch pocket fits deep mattresses, and the fabric is breathable. Owners report they sleep cooler than with standard sheets.
Material Cooling microfiberPocket Depth 18 inchesBreathability HighSizes Twin to Cal King
- Cooling effect
- Moisture-wicking
- Deep pocket
- May be thinner than others
Best for: best for hot sleepers
Comfort Spaces Deep Pocket Sheets (18 Inch)
★★★★★ 4.3 / 5 best for adjustable bed use
These sheets feature extra-long elastic and a deep pocket designed for adjustable beds. The fabric is stretchy and moves with the mattress. They are designed to stay put when the head or foot is raised.
Pocket Depth 18 inchesMaterial Microfiber with spandexElastic Extra-longSizes Twin, Full, Queen, King, Cal King
- Designed for adjustable beds
- Stretchy
- Stays in place
Best for: best for adjustable bed use
We focused on pocket depth, stretch, and secure fit features like corner straps. We also considered how well each sheet stays put when the head or foot is raised. The list balances performance, value, and specific needs.
What to Look For in Sheets for an 18-Inch Mattress
The most critical spec is pocket depth. Standard deep pockets are 15 inches, but an 18-inch mattress needs a true 18-inch pocket. Check the product description for the exact depth. Also consider the fabric's stretch, as it helps the sheet conform to the mattress when the base is adjusted. Look for full elastic or corner straps to keep the sheet secure.
How Adjustable Beds Affect Sheet Fit
Adjustable beds change shape, so sheets need to flex. A non-stretch sheet will pop off when the head is raised. Stretchy fabrics like jersey knit or microfiber with spandex are ideal. Even with deep pockets, the sheet must have enough give to move with the mattress. Some sheets have extra-long elastic or straps to anchor them.
Material Choices: Microfiber vs. Cotton vs. Jersey
Microfiber is common and affordable, but it can trap heat. Cotton is breathable but may lack stretch unless blended with spandex. Jersey knit is stretchy and soft, but may pill. For adjustable beds, a stretchy material is more important than thread count. Cooling features are a bonus for hot sleepers.
How to Keep Sheets on an Adjustable Bed
Use sheets with a deep enough pocket and full elastic. Some people use sheet straps or clips for extra security. If the sheet is too small, it will slide. Consider buying sheets specifically designed for adjustable beds, as they often have reinforced corners. Owners report that stretchy fabrics stay put better than rigid ones.
Questions people ask
What is the best sheet depth for an 18-inch mattress?
You need a fitted sheet with a pocket depth of at least 18 inches. Some sheets with 15-inch pockets can stretch to fit, but a true 18-inch pocket is more secure.
Can I use regular fitted sheets on an 18-inch adjustable mattress?
Regular sheets with a 14-inch pocket will not fit. Even deep pocket sheets of 15 inches may be too small. You need sheets designed for 18-inch depth or with stretch.
How do I measure the depth of my mattress?
Measure from the top of the mattress to the bottom, including the pillow top if any. For an adjustable bed, also consider the base thickness. The sheet pocket must cover both.
Are microfiber sheets good for adjustable beds?
Yes, if they have stretch. Microfiber is durable and affordable. Look for microfiber blended with spandex for flexibility.
Do I need special sheets for an adjustable bed?
Not necessarily, but sheets with deep pockets and stretch work best. Specialized sheets often have features like extra elastic or straps.
How do I keep sheets from slipping off an adjustable bed?
Use sheets with a deep pocket and full elastic. You can also use sheet clips or suspenders. Stretchy sheets conform better to the mattress shape.
What is the difference between 15-inch and 18-inch deep pockets?
A 15-inch pocket fits mattresses up to 15 inches thick. An 18-inch pocket fits up to 18 inches. For an 18-inch mattress, you need the larger pocket.
Can I use a mattress topper with deep pocket sheets?
Yes, but the topper adds height. If your mattress is 18 inches, a topper may make it thicker. You might need sheets with a deeper pocket, like 20 inches.
The bottom lineSo which one?
For most people, the CGK Unlimited 18 Inch Deep Pocket Sheets are the best choice due to their true fit and security. If you prioritize stretch and softness, the Mellanni Adjustable Bed Sheets are excellent. Budget shoppers can rely on the Southshore Fine Linens for a good balance of price and performance.
