---
product_id: 197657484
title: "Sleep Element King Mattress - Medium Feel - Motion Isolation - Breathable, Cooling Memory Foam - 100-Night Trial - CertiPUR-US"
brand: "casper"
price: "£892.21"
currency: GBP
in_stock: true
reviews_count: 8
category: "Casper"
url: https://www.desertcart.co.uk/products/197657484-sleep-element-king-mattress-medium-feel-motion-isolation-breathable-cooling
store_origin: GB
region: United Kingdom
---

# Advanced motion isolation Breathable open-cell foam 10-inch medium firmness Sleep Element King Mattress - Medium Feel - Motion Isolation - Breathable, Cooling Memory Foam - 100-Night Trial - CertiPUR-US

**Brand:** casper
**Price:** £892.21
**Availability:** ✅ In Stock

## Summary

> 🛌 Sleep smarter, not harder — wake up refreshed and unstoppable!

## Quick Answers

- **What is this?** Sleep Element King Mattress - Medium Feel - Motion Isolation - Breathable, Cooling Memory Foam - 100-Night Trial - CertiPUR-US by casper
- **How much does it cost?** £892.21 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/197657484-sleep-element-king-mattress-medium-feel-motion-isolation-breathable-cooling)

## Best For

- casper enthusiasts

## Why This Product

- Trusted casper brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last a Decade:** Durable foams resist sinking and sagging, maintaining comfort year after year.
- • **Stay Cool All Night Long:** Open-cell Flex Foam promotes airflow to prevent overheating and restless nights.
- • **Risk-Free Rest Revolution:** 100-night trial, hassle-free returns, CertiPUR-US certified, plus a 10-year warranty for total peace of mind.
- • **Uninterrupted Sleep Guaranteed:** Premium foam layers absorb motion transfer, so partner movements won’t disturb you.
- • **Balanced Comfort for Every Sleeper:** Medium firmness perfectly supports side, back, and stomach sleepers alike.

## Overview

The Casper Sleep Element King Mattress offers a 10-inch medium-firm memory foam design engineered for all sleep styles. Featuring breathable open-cell foam to keep you cool, advanced motion isolation for undisturbed rest, and durable materials certified by CertiPUR-US, it promises lasting comfort backed by a 100-night trial and a 10-year warranty.

## Description

Experience dreamy comfort at an unbeatable price with the Casper Element Mattress. This medium-feel memory foam mattress combines a soft, breathable top layer with supportive base foam to relieve pressure points and cradle your curves. Open-cell foam layers promote airflow to help you stay cool all night, while the durable base prevents sinking and sagging for long-lasting comfort. Ideal for side, back, and stomach sleepers, the Element delivers a balanced mix of softness and support. All foams are CertiPUR-US certified, made without ozone-depleting chemicals, and meet strict indoor air quality standards. Enjoy premium Casper comfort at a price that won’t break the bank.

Review: Try it you'll like it!! - I am enjoying my new Casper sleep element bed. It is very comfortable and just soft enough to sleep on my side without any discomfort. Thank you for such a quality product at a reasonable price.
Review: You won't be sorry. - Consistently comfortable, supportive, and unlikely to disturb your sleep when your spouse rolls over, Casper Sleep Element Full Mattress gets 5 stars from me! I am slowly transitioning all our family's mattresses to Caspers, and now have purchased 5 total. The convenience of it's arrival in a box is a wonder! It is tightly wrapped and vacuum packed into a plastic bag, so it was OK when we didn't get the delivery right away and it was outside for a few days. You have to open it and let it expand before you use it. I have heard that the "gasses" involved are not great to breath so always leave it in an empty room inflating/degassing for a day or two before use, but a recent Google didn't turn up any further info on that, so maybe it was just put out by the haters.

## Features

- Recycled Polyester / Polyester / Upcycled Cotton / Rayon / Lycra
- DESIGNED FOR ALL SLEEPERS: Balanced support and medium firmness fits all sleep styles
- PREVENTS OVERHEATING ALL NIGHT: Unlike traditional memory foam Casper's breathable open-cell Flex Foam keeps air flowing so you can stay sleeping cool
- ADVANCED MOTION ISOLATION: Layers of premium foam absorb motion transfer, giving you uninterrupted rest- even if your partner moves throughout the night
- DECADE OF DURABILITY: Casper mattresses use premium foams that prevent sinking and sagging, keeping your bed comfy and supportive year after year
- WORRY-FREE PURCHASE: 100-night risk-free trial with support from the Casper customer service team, CertiPUR-US certified, hassle-free returns, reliable 10-year limited warranty, and financing with Affirm up to 24 months 0% APR

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B085H9Q11C |
| Additional Features | Breathable, Cooling Technology, Durable, Low Motion Transfer, Orthopedic, Pressure Relief |
| Age Range Description | Adult |
| Best Sellers Rank | #43,237 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #144 in Mattresses |
| Brand | Casper |
| Brand Name | Casper |
| Color | Grey |
| Construction Type | Foam Construction |
| Cover Material | Polycotton |
| Customer Reviews | 4.4 out of 5 stars 5,986 Reviews |
| Fill Material | Memory Foam |
| Included Components | Mattress |
| Is Customizable? | No |
| Is Foldable | No |
| Item Depth | 10 inches |
| Item Dimensions | 80 x 76 x 10 inches |
| Item Dimensions L x W x Thickness | 80"L x 76"W x 10"Th |
| Item Firmness Description | Medium Firm |
| Item Thickness | 10 Inches |
| Item Type Name | Bed Mattress Conventional |
| Item Weight | 87 Pounds |
| Manufacturer | Casper Sleep |
| Manufacturer Part Number | 950-000065-005 |
| Manufacturer Warranty Description | 10-year limited. |
| Material Type | Polyurethane Foam |
| Mattress Comfort Layer Material | Latex Foam |
| Model Name | Element |
| Model Number | 950-000065-005 |
| Number of Layers | 4 |
| Portable | No |
| Product Benefits | Back Pain Relief, Improves Sleep, Posture Support, Pressure Relief, Reduces Toss & Turn, Stress Relief |
| Product Care Instructions | DO NOT REMOVE OR WASH . Spot Clean only. To spot clean, Vacuum your mattress, sprinkle some baking soda on it. Use a scrub brush to gently rub the powder into the mattress and leave it for 10 minutes or so. Vacuum the excess powder. Do not wash. Do not use bleach. Do not machine dry.Do not iron.Do not dry clean. |
| Product Dimensions | 80"L x 76"W x 10"Th |
| Set Name | Casper Element |
| Shape | Rectangular |
| Size | King |
| Style Name | 10 " Element Foam |
| Top Style | Tight Top |
| UPC | 192472014743 |
| Weight Capacity Maximum | 1000 Pounds |
| top-style | Tight Top |

## Product Details

- **Brand:** Casper
- **Cover Material:** Polycotton
- **Fill Material:** Memory Foam
- **Item Firmness Description:** Medium Firm
- **Item Weight:** 87 Pounds
- **Number of Layers:** 4
- **Product Dimensions:** 80"L x 76"W x 10"Th
- **Size:** King
- **Top Style:** Tight Top
- **Weight Limit:** 1000 Pounds

## Images

![Sleep Element King Mattress - Medium Feel - Motion Isolation - Breathable, Cooling Memory Foam - 100-Night Trial - CertiPUR-US - Image 1](https://m.media-amazon.com/images/I/61-+VpOsFlL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Questions & Answers

**Q: How does it do in the cold unheated bedroom ?**
A: Hi there! Whoile foam can become stiffer in freezing temperatures you should not experience anything like this in a slightly colder room.

**Q: Is the 100 night trial return on new model as well?**
A: They expect customers to deflate and put the decompressed mattress back in a box and don’t offer pickup service at all! Do not buy from Amazon

**Q: How much does the king mattress weigh?**
A: It weighs 87 pounds.

**Q: What is the exact length of the full? They always say 75, but in reality it varies quite a bot. I need a 74" or less.**
A: Hi there! The dimensions of the Element size-full are 75"x 53" x10". Unfortunately, if you are in need of something that is 74" this would not be the right fit.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Try it you'll like it!!
*by S***S on March 3, 2026*

I am enjoying my new Casper sleep element bed. It is very comfortable and just soft enough to sleep on my side without any discomfort. Thank you for such a quality product at a reasonable price.

### ⭐⭐⭐⭐⭐ You won't be sorry.
*by K***R on November 12, 2025*

Consistently comfortable, supportive, and unlikely to disturb your sleep when your spouse rolls over, Casper Sleep Element Full Mattress gets 5 stars from me! I am slowly transitioning all our family's mattresses to Caspers, and now have purchased 5 total. The convenience of it's arrival in a box is a wonder! It is tightly wrapped and vacuum packed into a plastic bag, so it was OK when we didn't get the delivery right away and it was outside for a few days. You have to open it and let it expand before you use it. I have heard that the "gasses" involved are not great to breath so always leave it in an empty room inflating/degassing for a day or two before use, but a recent Google didn't turn up any further info on that, so maybe it was just put out by the haters.

### ⭐⭐⭐⭐⭐ Love it even more at 4 months!
*by D***H on February 11, 2025*

Mattress 2: Staying at a relatives house who needs help and have had to sleep on an old mattress for a month and I could barely stand up straight from back pain. I decided to just buy another mattress even if I’m only going to use it for a few months. Night 2 and I’ve finally actually slept. After the first night where the mattress was still a little soft - I still slept better than the last month and the relief from pain was obvious!!! Previous review for mattress 1: So far, I love it! The bottom of the mattress is a little grippy and the mattress doesn’t slide on my frame. Love the quality casing that comes off for cleaning. Feels supportive. Solid quality. Good choice. Been sleeping on it for awhile now and I still love it! 4 months and love it even more!

## Frequently Bought Together

- Casper Sleep Element, Medium Firm Mattress, King Size - Memory Foam + Support - 100-Night Trial - CertiPUR-US Mattress, Grey
- PlushDeluxe Premium Bamboo Mattress Protector – King Size, Waterproof, & Ultra Soft Breathable Noiseless Washable Bed Mattress Cover for Comfort & Protection - White
- Beckham Hotel Collection Bed Pillows King Size Set of 2 - Down Alternative Bedding Gel Cooling Big Pillow for Back, Stomach or Side Sleepers

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**Shop now:** [https://www.desertcart.co.uk/products/197657484-sleep-element-king-mattress-medium-feel-motion-isolation-breathable-cooling](https://www.desertcart.co.uk/products/197657484-sleep-element-king-mattress-medium-feel-motion-isolation-breathable-cooling)

---

*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-16*