Arthur Arthur Sleep Rock Arthur Extra Firm Mattress

Rock Arthur Orthopaedic Mattress – 23cm Deep | Extra Firm Support | Zoned Pocket SpringsFor those who need serious support, the Rock Arthur Mattress delivers uncompromising firmness in a streamlined 23cm profile. Built with a focus on spinal alignment and long-term back care, this extra firm mattress is ideal for sleepers who prefer a solid, stable feel with zero sag.Key Features:Targeted Extra Firm Comfort – One of the firmest mattresses in the Arthur Sleep range, ideal for back support and posture correction23cm Depth – Streamlined, supportive, and perfect for all bed typesZoned Pocket Spring System – Individually wrapped springs adjust to your body, offering firmer support where you need it mostOrthopaedic Foam Layers – Dense foam provides structure and pressure relief without softnessBreathable Quilted Top – Keeps airflow moving for a cooler night’s sleepVacuum-Packed & Rolled – Easy to transport, set up, and manoeuvre through tight spaces10-Year Warranty – Durable construction backed by long-term peace of mindNo-Turn Design – Single-sided for low-maintenance convenienceDesigned for back and stomach sleepers—or anyone who craves extra support without compromise—the Rock Arthur is your foundation for better sleep posture and firmer comfort.
Product ID: 23688496
Rock Arthur Orthopaedic Mattress – 23cm Deep | Extra Firm Support | Zoned Pocket SpringsFor those who need serious support, the Rock Arthur Mattress delivers uncompromising firmness in a streamlined 23cm profile. Built with a focus on spinal alignment and long-term back care, this extra firm mattress is ideal for sleepers who prefer a solid, stable feel with zero sag.Key Features:Targeted Extra Firm Comfort – One of the firmest mattresses in the Arthur Sleep range, ideal for back support and posture correction23cm Depth – Streamlined, supportive, and perfect for all bed typesZoned Pocket Spring System – Individually wrapped springs adjust to your body, offering firmer support where you need it mostOrthopaedic Foam Layers – Dense foam provides structure and pressure relief without softnessBreathable Quilted Top – Keeps airflow moving for a cooler night’s sleepVacuum-Packed & Rolled – Easy to transport, set up, and manoeuvre through tight spaces10-Year Warranty – Durable construction backed by long-term peace of mindNo-Turn Design – Single-sided for low-maintenance convenienceDesigned for back and stomach sleepers—or anyone who craves extra support without compromise—the Rock Arthur is your foundation for better sleep posture and firmer comfort.

Delivery Options

Economy Delivery (UK) — £3.99 Delivered in 4–7 working days.
Standard Delivery (UK) — £4.99 Delivered in 2–4 working days.
Next Day Delivery (UK) — £7.99 Delivered the next working day on selected items. Terms & conditions apply.*

How Next Day Delivery Works

Upgrade your order to Next Day Delivery and receive your item(s) the next working day.
Orders placed by 9pm, Monday to Friday will arrive the next working day.

Scottish Highlands & Northern Ireland postcodes:

Orders placed between 9pm Friday and 2pm Sunday will be delivered on Tuesday if you live in the following areas: AB, BT, DD, EH, EX, FK, G, IV, IoM, KA, KY, ML, PA, PH, PL, TD, TR.
Remote postcodes (two working days): Our Next Day Delivery service takes two working days instead of one for the following postcodes: HS2, KW16–17, PA61–PA75, PA78, PH30, PH41–44, ZE2–3.

Ireland & The Channel Islands:

All orders to Ireland and the Channel Islands are eligible for standard delivery at a fixed fee of £7.95.

Channel Islands: Standard delivery in 3–4 days (£7.95), or Express delivery in 2 days (£9.50).
Republic of Ireland: Delivery within 7–10 days.


Unfortunately, Next Day Delivery is not available to Ireland or the Channel Islands.

Marketplace Items

The BrandAlley Marketplace allows our carefully selected partner sellers to offer you an additional range of products. Marketplace items are clearly labelled on the product page as 'Shipped from our partner'.
These sellers are responsible for managing your order, including shipping, delivery, and customer service.
Delivery timeframes and costs may vary by seller, you'll see the details clearly displayed at checkout before you place your order.
For any questions about your marketplace order, please contact the seller directly via your account.

Items available on pre-order means our suppliers send stock to our warehouse once you've placed your order. Because of this, delivery times can vary from sale to sale.
To see exactly when your item will arrive, please check the estimated delivery date (ETA) shown on the product page, in your basket, and at checkout.
If you order from more than one sale, we'll automatically split your order and ship items separately as they become available, so you receive each piece as soon as possible.

Delivery Options

Economy Delivery (UK) — £3.99 Delivered within 4–7 working days of our warehouse receiving your item from the supplier.
Standard Delivery (UK) — £4.99 Delivered within 2–4 working days of our warehouse receiving your item from the supplier.

Delivery Options

Economy Delivery (UK) — £3.99 Delivered in 4–7 working days.
Standard Delivery (UK) — £4.99 Delivered in 2–4 working days.
Next Day Delivery (UK) — £7.99 Delivered the next working day on selected items. Terms & conditions apply.*

How Next Day Delivery Works

Upgrade your order to Next Day Delivery and receive your item(s) the next working day.
Orders placed by 9pm, Monday to Friday will arrive the next working day.

Scottish Highlands & Northern Ireland postcodes:

Orders placed between 9pm Friday and 2pm Sunday will be delivered on Tuesday if you live in the following areas: AB, BT, DD, EH, EX, FK, G, IV, IoM, KA, KY, ML, PA, PH, PL, TD, TR.
Remote postcodes (two working days): Our Next Day Delivery service takes two working days instead of one for the following postcodes: HS2, KW16–17, PA61–PA75, PA78, PH30, PH41–44, ZE2–3.

Ireland & The Channel Islands:

All orders to Ireland and the Channel Islands are eligible for standard delivery at a fixed fee of £7.95.

Channel Islands: Standard delivery in 3–4 days (£7.95), or Express delivery in 2 days (£9.50).
Republic of Ireland: Delivery within 7–10 days.


Unfortunately, Next Day Delivery is not available to Ireland or the Channel Islands.

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