Generic illustration · not a product photograph

The Rock

Name: Delarkin The Rock
Brand: Delarkin

Best for: Firm foam for an Alaskan king

A firm 10″ memory foam mattress; the Alaskan King page lists 108″ × 108″.

Good to know: Most other Rock size pages list inches that don't match the size name, so confirm any size by phone before ordering.

Type: Memory foam
Height: 10″
Sizes: Made to order + custom

Your size

108 × 108 in · 10″ tall

Where to get it

delarkin.comOrder online · delivered to you Get a quote

Returns: 90 nights; switch models or return for a full refund Details

We may earn a commission if you buy. Check the price for your exact size and height on the seller’s site.

The short version

Worth a look if

Firm foam for an Alaskan king

Good

A firm 10″ memory foam mattress; the Alaskan King page lists 108″ × 108″.
Trial: 90 nights; switch models or return for a full refund
Height: 10″
Sizes: Twin, Twin XL, Three Quarter, Full, Full XL, Short Queen / RV Queen, Queen, King, RV King, Cal King, Texas King, Wyoming King, Alaskan King (108 × 108)

Think about

Most other Rock size pages list inches that don't match the size name, so confirm any size by phone before ordering.
No owner reviews we could verify yet

Based on the maker’s published specs and terms, and the owner reviews linked below. We haven’t slept on it. Something wrong? Tell us.

What owners say

No owner reviews we can verify yet A small set of real reviews, each linked to its source. Not a star rating.

No independent owner reviews naming this Delarkin model were found.

What people liked

No supported praise summary in the sample.

What to weigh up

No substantive concern verified in this small sample. This is a gap in the evidence, not proof of no drawbacks.

Sources & sample limits

none found Sample: 0 owner reports.

Owner comments were not searched beyond the brand site; the product pages show no reviews.

Research checked October 14, 2026. These are sourced observations, not our own product tests or a star rating.

Every size it comes in

Alaskan king108 × 108 in10″

Taken from the maker’s size options, in the inches it publishes. Tap a size to compare every mattress made in it.

How it compares

Beside the most similar mattresses from other brands.

	The RockDelarkin	The Grand RoyaleAlaskan King Bed Company	The OriginalAlaskan King Bed Company	The RoyaleAlaskan King Bed Company
Type	Memory foam	Foam	Foam	Foam
Queen price	—	$11,000	$3,800	$4,400
Height	10″	15″	11″	12″
Trial	90 nights	See terms	See terms	See terms
Odd sizes	1	1	1	1
Expert reviews	None yet	None yet	None yet	None yet

What’s inside

1100% cotton zip cover
2Memory foam top layer
3Extra firm support foam layers
4Polyurethane support foam

Feel: Firm
Height: 10″
Custom sizes: Yes, the maker builds to your measurements

Complete the bed

Odd sizes need everything else in the same inches. Here’s what we have for this mattress’s odd sizes.

Alaskan king · 108 × 108

Returns and ordering

Trial and returns

90 nights; switch models or return for a full refund

Before you order

Measure inside the frame, not the old mattress
Check clearance above for the height you pick
Make sure your base supports it
Buy sheets in the same exact size

Questions

What is it made of?

A firm 10″ model: The Oasis with extra layers of firm support foam, aimed at stomach sleepers and big and tall sleepers who bottom out. Memory foam top over polyurethane support foam. Hand-built in Delarkin's South Carolina factory and shipped roll-packed in a box, with a removable, washable 100% cotton zip cover. Any size or shape can be made to order.

How firm is it?

Firm That’s the maker’s description; we haven’t measured it.

Which sizes and heights can I get?

1 sizes, 10″. See every size. Confirm your exact size and height with the seller.

Are the reviews about this exact mattress?

No owner reviews we can verify yet. Owner comments were not searched beyond the brand site; the product pages show no reviews.

Where did this information come from?

Checked 2026-10-28. Specs and terms can change.