Adjustable Bed Sheets
Deep Pocket Sheets for 18 Inch Adjustable Beds
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 offer the best fit and stretch. Each holds securely during movement.
?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 pocket depth of 18 inches, designed for thick mattresses. The microfiber fabric offers four-way stretch, moving with your adjustable base. Owners report the fitted sheet stays snug even at full incline.
Pocket Depth 18 inchesMaterial MicrofiberStretch Four-wayIncludes Fitted, flat, 2 pillowcases
- Exact fit for 18 inch mattresses
- Stretches with bed movement
- Strong elastic corners
- May be too deep for thinner mattresses
Mellanni Deep Pocket Sheets
★★★★★ 4.6 / 5 Best Value
Mellanni offers a 16 inch pocket depth, but the brushed microfiber stretches to accommodate 18 inches. The fabric is breathable and soft, ideal for all seasons. Many owners use these on adjustable beds without slipping.
Pocket Depth 16 inches (stretches to 18)Material Brushed microfiberStretch Two-wayIncludes Fitted, flat, 2 pillowcases
- Budget-friendly price
- Soft and breathable
- Good stretch for adjustable use
- Pocket depth is not true 18 inches
CGK Unlimited Deep Pocket Sheets
★★★★★ 4.5 / 5 Best Budget
CGK Unlimited provides a 17 inch pocket depth at a low price. The microfiber material is durable and resists wrinkles. Owners say the elastic all around keeps the sheet in place during adjustable movements.
Pocket Depth 17 inchesMaterial MicrofiberStretch LimitedIncludes Fitted sheet only
- Very affordable
- Full elastic perimeter
- Wrinkle-resistant
- Only fitted sheet included
- Less stretch than others
Utopia Bedding Deep Pocket Sheets
★★★★★ 4.6 / 5 Best for Hot Sleepers
Utopia Bedding uses a microfiber weave that feels cool to the touch. The 16 inch pocket depth stretches slightly, but the fabric is thinner, promoting airflow. Owners appreciate the crisp feel that doesn't trap heat.
Pocket Depth 16 inchesMaterial MicrofiberBreathability HighIncludes Fitted, flat, 2 pillowcases
- Cooling effect
- Lightweight fabric
- Good for warm sleepers
- May not fit very thick toppers
Best for: Best for Hot Sleepers
Southshore Fine Bedding Deep Pocket Sheets
★★★★★ 4.4 / 5 Best for Side Sleepers
Southshore Fine Bedding offers a 16 inch pocket depth with a soft, silky finish. The microfiber is gentle on skin and reduces friction. Owners report the sheets stay smooth even when the bed is raised.
Pocket Depth 16 inchesMaterial MicrofiberTexture Silky smoothIncludes Fitted, flat, 2 pillowcases
- Soft and silky feel
- Low friction for skin
- Secure fit on adjustable bases
- Pocket depth is borderline for 18 inches
Best for: Best for Side Sleepers
Bedsure Deep Pocket Sheets
★★★★★ 4.5 / 5 Best for Adjustable Bases
Bedsure's fitted sheet has a 17 inch pocket and extra-wide elastic bands. The elastic runs along the entire bottom edge, preventing slippage. Owners praise the grip when the head or foot is elevated.
Pocket Depth 17 inchesMaterial MicrofiberElastic Full perimeterIncludes Fitted sheet only
- Strong grip on mattress
- Full elastic band
- Holds shape during movement
- No flat sheet or pillowcases
Best for: Best for Adjustable Bases
Elegant Comfort Deep Pocket Sheets
★★★★★ 4.3 / 5 Best for Extra Thick Mattresses
Elegant Comfort provides a 18 inch pocket depth, matching the mattress exactly. The microfiber is thick and durable, offering a plush feel. Owners with pillow-top mattresses find this set fits without excess fabric.
Pocket Depth 18 inchesMaterial MicrofiberThickness HeavyweightIncludes Fitted, flat, 2 pillowcases
- True 18 inch pocket
- Thick and durable fabric
- Good for pillow-top mattresses
- Heavier fabric may feel warm
Best for: Best for Extra Thick Mattresses
We also read owner feedback on how sheets behave when the bed bends. Adjustable bases need extra give in the fabric. Our picks prioritize stretch, grip, and secure fit without bunching.
Pocket Depth and Fit
Deep pocket sheets are measured by the fitted sheet's pocket depth. For an 18 inch mattress, look for a pocket depth of at least 16 inches, but 18 inches is safer. A sheet that is too shallow will pop off, especially with an adjustable base. Measure your mattress thickness before buying. Add an extra inch if you use a mattress topper.
Fabric Stretch and Adjustable Beds
Adjustable beds move, so the fabric must stretch. Microfiber is a common choice because it has some give. Four-way stretch means the sheet moves in all directions, reducing bunching. Two-way stretch may be enough for slight adjustments. Check the product description for stretch details. Stiffer fabrics like cotton may not work as well.
Elastic and Grip
The elastic around the fitted sheet's edge is crucial. Full perimeter elastic provides the best grip. Some sheets have elastic only at the corners, which can slip. Look for sheets with wide elastic bands. These hold the sheet in place when the bed is raised or lowered. Owner reviews often mention how well the sheet stays put.
Material and Comfort
Material affects breathability and softness. Microfiber is soft and wrinkle-resistant but may trap heat. For hot sleepers, consider a lighter weave. Cotton is breathable but less stretchy. Some blends offer a balance. Think about your sleeping temperature and skin sensitivity. Choose a fabric that feels comfortable against your skin.
Questions people ask
What is the best deep pocket sheet for an 18 inch mattress?
The Brooklyn Bedding Deep Pocket Sheet Set is a top choice. It has an 18 inch pocket depth and four-way stretch. The Mellanni and CGK Unlimited sets also work well for many owners.
Can I use regular deep pocket sheets on an 18 inch mattress?
Regular deep pocket sheets usually have a 15 or 16 inch pocket. They may not fit an 18 inch mattress properly. Look for sheets with a pocket depth of at least 16 inches and stretch. Measure your mattress to be sure.
How do I measure my mattress for deep pocket sheets?
Use a tape measure to measure the thickness of your mattress from the top to the bottom. Include any mattress topper. Add 1 to 2 inches to that number to find the minimum pocket depth you need.
Do deep pocket sheets work with adjustable beds?
Yes, but you need sheets with stretch and good elastic. Adjustable beds move, so the sheet must flex. Microfiber with four-way stretch is ideal. Full perimeter elastic helps keep the sheet in place.
What is the difference between deep pocket and extra deep pocket sheets?
Deep pocket sheets typically have a 15 to 16 inch pocket. Extra deep pocket sheets have 17 to 22 inches. For an 18 inch mattress, you need extra deep sheets.
Are microfiber sheets good for adjustable beds?
Microfiber sheets are a popular choice for adjustable beds. They are stretchy, soft, and wrinkle-resistant. However, they may not be as breathable as cotton. Consider your temperature preferences.
How can I keep my sheets from slipping on an adjustable bed?
Use sheets with full perimeter elastic and a snug fit. You can also use sheet fasteners or straps. Some owners use a mattress pad to add grip. Ensure the sheet is not too loose.
Is it worth buying expensive deep pocket sheets?
Expensive sheets often have better fabric quality and more stretch. They may last longer and fit better. But budget options like CGK Unlimited can work well. Read reviews to see how they hold up.
What is the best material for deep pocket sheets?
Microfiber is a common choice because it is stretchy and affordable. Cotton is breathable but less stretchy. A cotton-polyester blend offers a balance. Choose based on your comfort needs.
Can I use a mattress topper with deep pocket sheets?
Yes, but the topper adds thickness. Measure the total height of your mattress plus topper. Choose sheets with a pocket depth that accommodates that. Many deep pocket sheets can handle a 2 inch topper.
The bottom lineSo which one?
For an 18 inch adjustable mattress, prioritize pocket depth, stretch, and elastic grip. The Brooklyn Bedding set is the best overall for its exact fit and flexibility. If you are on a budget, the Mellanni or CGK Unlimited sets are reliable alternatives.
