A “his & hers adjustable bed” is another name for a split king adjustable bed package.

A split king consists of:

• Two Twin XL mattresses
• Two independent adjustable bases
• Placed side by side to form a king-size bed

This setup is popular with couples because each person controls their own side of the bed.

Key benefits of a his & hers (split king) adjustable bed:

• Each sleeper can raise or lower their head and feet independently
• Each person can choose their own mattress comfort level
• One side can be firm while the other is plush
• No compromise on comfort or sleep position

This level of personalization is why split king adjustable beds are one of the most requested adjustable bed options at Mattress Folks.

No.

A traditional box spring (also called a foundation) is not used with an adjustable base.

When you upgrade to an adjustable bed:

• The adjustable base replaces the box spring entirely
• The mattress sits directly on the adjustable base
• This allows the base to move and support the mattress properly

Using a box spring with an adjustable base is unnecessary and not recommended.

Adjustable bases are designed to keep the mattress securely in place.

Most adjustable beds include:

• A non-slip fabric surface on the base platform
• A metal retaining bar at the foot of the bed

Together, these features prevent the mattress from shifting or sliding—even when the bed is elevated or adjusted frequently.

Adjustable bed height varies by manufacturer and model, but most bases are designed to be customizable.

Height options may include:

• Standard legs included with the base
• Optional shorter or taller legs included or available
• Some models include casters (wheels) that may be removable

If you want:

• A taller bed — risers can often be added
• A low-profile bed — legs can sometimes be shortened or removed

At Mattress Folks, we help you configure your adjustable base to match your preferred bed height and room setup.

A split king bed is simply two Twin XL mattresses side by side.

For sheets:

• Use Twin XL fitted sheets for each mattress
• Use a standard King flat sheet

Many retailers also sell split king sheet sets, which typically include:

• 2 Twin XL fitted sheets
• 1 King flat sheet
• 2 King pillowcases

Split king sheets are widely available both in stores and online.