18 Inch Ultra Deep Egyptian Cotton Fitted Sheets

Enjoy a smoother, deeper and more secure fit with our 18 Inch Ultra Deep Egyptian Cotton Fitted Sheets, made for very deep mattresses, mattress toppers and luxury beds that need more than a standard fitted sheet.

If you have ever woken up to find your fitted sheet has lifted off the corners, twisted underneath you or pulled away from the mattress during the night, the problem is usually not the mattress. It is the sheet depth. Modern mattresses are deeper than ever, especially when used with pillow top layers, mattress toppers, protectors or luxury comfort systems. A standard fitted sheet simply may not offer enough fabric to stay in place properly.

Our 18 inch ultra deep Egyptian cotton fitted sheets are designed for exactly that problem. Made from a beautiful 400 thread count cotton sateen fabric using strong long staple cotton yarns, these sheets combine luxury, comfort and practicality with the extra depth needed for a more reliable fit.

With an ultra deep 18 inch box depth, a smooth cotton sateen finish, machine washable care and a 7 year guarantee, this is the fitted sheet to choose when ordinary deep sheets are simply not deep enough.

Why Choose 18 Inch Ultra Deep Fitted Sheets?

Not all fitted sheets are made for modern beds. Many mattresses now measure much deeper than traditional styles, especially when combined with a mattress topper or protector. If the sheet is too shallow, it can stretch too tightly, lift at the corners, create creases or come loose during the night.

An 18 inch ultra deep fitted sheet gives you the extra depth needed to cover deeper mattresses more comfortably. It helps the sheet tuck further underneath the mattress, creating a neater finish and a more secure feel.

This makes it ideal for deep mattresses, thick mattresses, pillow top mattresses and beds with mattress toppers.

Key Benefits

• 18 inch ultra deep box depth for very deep mattresses and topper combinations
• 400 thread count Egyptian cotton for smooth, breathable luxury
• Cotton sateen weave for a soft, elegant finish
• Long staple cotton yarns for strength, comfort and quality
• Ideal for deep mattresses and mattress toppers
• Machine washable for easy everyday care
• Tumble dry safe for practical laundering
• 7 year guarantee for added confidence
• Available in Single, Double, King and Super King
• Available in White and Ivory

Made from 400 Thread Count Egyptian Cotton

Egyptian cotton is known for its long, fine fibres, which can be spun into smooth and durable yarns. This gives the fabric a soft, premium feel while helping the sheet remain strong enough for regular use.

The 400 thread count construction offers an excellent balance of softness, breathability and durability. It feels noticeably more luxurious than basic cotton or polycotton sheets, while still being practical enough for everyday bedding.

This makes these ultra deep Egyptian cotton fitted sheets a superb choice for customers who want high-quality bedding without choosing a fabric that feels too heavy or difficult to care for.

The Soft Feel of Cotton Sateen

These sheets are woven in a cotton sateen fabric, giving them a smoother and softer feel than a crisp percale weave. Sateen has a subtle sheen and a beautiful drape, making the bed look more elegant and feel more inviting.

If you like fitted sheets that feel smooth, soft and luxurious against the skin, cotton sateen is an excellent choice. It brings a hotel-inspired finish to the bedroom while still offering the breathability and natural comfort of cotton.

Perfect for Mattress Toppers

Mattress toppers are a brilliant way to add extra comfort, but they also increase the total depth of your bed. Once you add a topper and mattress protector, a standard fitted sheet can quickly become too shallow.

That is where an 18 inch fitted sheet becomes essential. The generous depth is designed to accommodate thicker mattress setups, helping the sheet cover the mattress and topper more comfortably.

For the best finish, measure the full depth of your mattress, including any topper or protector, before ordering.

Available Sizes

These 18 Inch Ultra Deep Egyptian Cotton Fitted Sheets are available in the following UK sizes:

• Single: 90cm x 190cm
• Double: 135cm x 190cm
• King: 150cm x 200cm
• Super King: 180cm x 200cm

Each fitted sheet is made with an 18 inch box depth, making it ideal for many very deep mattresses and topper combinations.

Available Colours

• White
• Ivory

These classic colours are ideal for creating a clean, elegant and timeless bedroom. White offers a crisp hotel look, while ivory brings warmth and softness and works beautifully with traditional and neutral interiors.

18 Inch Ultra Deep Fitted Sheet Comparison

Who Are These Sheets Best For?

These ultra deep fitted sheets are ideal for anyone who struggles to find sheets that stay properly in place. They are particularly suitable for:

• Very deep mattresses
• Pillow top mattresses
• Mattresses used with toppers
• Luxury beds
• Guest bedrooms
• Holiday homes
• Hotels and serviced accommodation
• Customers who prefer a smoother, neater bed finish

15 Inch or 18 Inch Fitted Sheets?

If your mattress is moderately deep, a 15 inch extra deep fitted sheet may be enough. However, if your mattress is very deep or you use a thick topper, an 18 inch ultra deep fitted sheet is often the better choice.

The extra depth helps the sheet reach further around the mattress and tuck more securely underneath. This can make a noticeable difference to how the bed looks and feels, especially if you have struggled with fitted sheets coming loose in the past.

Complete Your Bed

For a more luxurious and comfortable bedding setup, pair your ultra deep fitted sheet with other quality bedding from Duvets Direct:

• 400TC Egyptian Cotton Extra Deep Sheets
• 1000 Count Extra Deep Egyptian Cotton Fitted Sheets
• 15 Inch Extra Deep Pima Cotton Fitted Sheets
• Luxury Mattress Toppers
• Cotton Quilted Mattress Protectors

Care Instructions

These Egyptian cotton fitted sheets are designed to be luxurious but practical. They are machine washable and tumble dry safe, making them easy to look after as part of your regular bedding routine.

• Machine washable
• Tumble dry safe
• Wash similar colours together
• Avoid overloading the washing machine
• Remove promptly from the dryer to reduce creasing
• Always follow the care label supplied with the product

Why Buy from Duvets Direct?

At Duvets Direct, we understand that better sleep starts with better bedding. Our fitted sheet collections are selected for comfort, quality, fit and long-term value, helping customers create beds that look better and feel more comfortable.

These 18 Inch Ultra Deep Egyptian Cotton Fitted Sheets are ideal for customers who need more depth than a standard sheet can provide, without compromising on fabric quality. With their 400 thread count Egyptian cotton sateen fabric, generous 18 inch depth and 7 year guarantee, they offer a reliable and luxurious solution for modern deeper mattresses.

Frequently Asked Questions

What is an 18 inch fitted sheet?

An 18 inch fitted sheet is made with a deeper box depth than standard fitted sheets. This extra depth helps it fit around very deep mattresses, pillow top mattresses and beds with mattress toppers.

Are these sheets made from Egyptian cotton?

Yes. These ultra deep fitted sheets are made from 400 thread count Egyptian cotton sateen fabric using strong long staple cotton yarns.

What sizes are available?

Available sizes include Single 90cm x 190cm, Double 135cm x 190cm, King 150cm x 200cm and Super King 180cm x 200cm.

What colours can I choose from?

These fitted sheets are available in White and Ivory.

Will an 18 inch sheet fit over a mattress topper?

In many cases, yes. The 18 inch depth is designed for deeper mattresses and topper combinations. Measure the total depth of your mattress and topper before ordering.

What is the difference between 15 inch and 18 inch fitted sheets?

A 15 inch fitted sheet is suitable for many deep mattresses. An 18 inch fitted sheet gives extra depth for very deep mattresses or beds with thicker toppers.

Are these sheets machine washable?

Yes. These fitted sheets are machine washable and tumble dry safe, making them practical for regular use.

Is 400 thread count good for fitted sheets?

Yes. A 400 thread count Egyptian cotton sheet offers a lovely balance of softness, breathability and durability, making it ideal for everyday luxury bedding.

Do these fitted sheets come with a guarantee?

Yes. This range includes a 7 year guarantee for added confidence.

Are these suitable for hotels or guest rooms?

Yes. Their ultra deep fit, luxury cotton sateen fabric and easy-care finish make them a strong choice for guest rooms, holiday lets and premium accommodation.

Order Your 18 Inch Ultra Deep Egyptian Cotton Fitted Sheet Today

If standard fitted sheets are too shallow and even extra deep sheets are not quite enough, our 18 Inch Ultra Deep Egyptian Cotton Fitted Sheets are the perfect solution.

Made from smooth 400 thread count Egyptian cotton sateen with an ultra deep 18 inch box depth, these sheets are designed to fit deeper mattresses more securely while adding a luxury feel to your bed.

Choose your size and colour today and enjoy a fitted sheet that finally fits properly.