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Crystli King Mattress - 12 Inch Memory Foam Hybrid, Medium Firm, CertiPUR-US Foam, Bed in a Box, King Size 80x76 Inches

6,916

239.99$

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  • Medium firm comfort support
  • CertiPUR-US certified safe foam
  • Hybrid design for durability
  • Bed-in-a-box easy setup
  • King size spacious sleeping

Pros

  • ✓Affordable price point for a hybrid mattress
  • ✓Medium-firm feel suits various sleeping positions
  • ✓Effective motion isolation for couples

Cons

  • ✗Edges may weaken slightly over time
  • ✗Some users sleep hotter on this mattress
  • ✗Threads from cover can loosen with use

Category mattresses

Brand Crystli

Crystli King Mattresses 12 inch Memory Foam Mattress King Size Hybrid Review

The Crystli King Mattress is a 12-inch hybrid mattress combining memory foam and pocketed innersprings in a bed-in-a-box format. It targets sleepers seeking a balance of comfort and support without a high price tag. This mattress is designed for king-size beds, offering a medium-firm feel that caters to various sleeping positions and body types. Its key value lies in providing targeted support for back alignment and pressure relief, along with features like motion isolation and cooling technology. Reviewers praise its affordability and comfort, noting it helps alleviate back pain and improves sleep quality. The CertiPUR-US certified foams ensure safety and durability, making it a practical choice for budget-conscious consumers. It arrives compressed for easy setup, expanding quickly to full size. With strong edge support and temperature regulation, it aims to deliver a restful night's sleep for individuals and couples alike.

Product Overview

The Crystli King Mattress measures 78.74 inches in length, 74.8 inches in width, and 12.2 inches in thickness, fitting standard king-size frames. It weighs 96.5 pounds, making it manageable for setup but substantial for durability. The hybrid construction layers include a high-end knit fabric cover, an air-flow foam layer with open cells for breathability, CertiPUR-US certified memory foam, and pocketed carbon steel spring coils. This design targets a medium-firm feel, balancing softness and firmness to suit back, side, and stomach sleepers. Variants may include different sizes, but this model is specifically king-sized. Ergonomics focus on even weight distribution and spinal alignment, with reviewers reporting reduced back pain and improved sleep. Care involves using a mattress protector to prevent damage from humidity or stains, as some note threads may loosen from the diamond-patterned cover. Portability is enhanced by the bed-in-a-box delivery, allowing it to fit through tight spaces and expand within a day. Compatibility includes most king bed frames, but users should ensure proper support to maintain warranty and performance. The mattress is designed for adults, with age range specified accordingly.

Key Features

Hybrid memory foam and spring design

  • ✓Combines CertiPUR-US certified memory foam with pocketed innersprings for balanced support
  • ✓Provides medium-firm feel suitable for all sleeping positions
  • ✓Enhances durability and reduces motion transfer between sleepers

Enhanced edge support system

  • ✓Uses carbon steel spring coils to reinforce mattress edges
  • ✓Prevents sagging and allows sitting on the edge without sliding
  • ✓Improves usable sleep surface and longevity

Advanced cooling technology

  • ✓Features an air-flow foam layer with millions of open cells for breathability
  • ✓Promotes maximum airflow to regulate temperature and reduce heat buildup
  • ✓High-end knit fabric cover adds comfort and enhances cooling effect

Motion isolation capabilities

  • ✓Pocketed springs work independently to absorb sound and vibration
  • ✓Minimizes disturbance from partner movement during sleep
  • ✓Ideal for couples or light sleepers seeking uninterrupted rest

Targeted body support and alignment

  • ✓Memory foam conforms to body contours for pressure relief
  • ✓Spring coils provide customized support for skeletal system
  • ✓Helps maintain proper back alignment and reduces pain points

CertiPUR-US certified materials

  • ✓Foams are certified for low emissions and durability
  • ✓Ensures safety and environmental standards are met
  • ✓Provides peace of mind regarding material quality and health

Bed-in-a-box convenience

  • ✓Arrives compressed in a box for easy shipping and handling
  • ✓Expands quickly to full size, often within a day
  • ✓Includes tool for safe unpacking without damaging the mattress

Durable construction for longevity

  • ✓High-quality materials resist indentations and sagging over time
  • ✓Reviewers report maintaining shape and comfort after months of use
  • ✓Suitable for long-term investment in sleep health

Design & Build

The Crystli King Mattress features a 12-inch hybrid design with multiple layers for comfort and support. The top layer is a high-end knit fabric cover that is soft and breathable, enhancing the sleeping surface. Beneath this, an air-flow foam layer contains millions of open cells that act as airway chambers, promoting ventilation and temperature regulation. The core includes CertiPUR-US certified memory foam that conforms to body shapes, providing pressure relief and contouring. The base layer consists of pocketed carbon steel spring coils that offer independent support and motion isolation. These coils are designed with high flexibility to reinforce edge support and distribute body weight evenly. The mattress is constructed to a medium-firm feel, balancing softness for comfort and firmness for spinal alignment. Aesthetics include a diamond pattern on the cover, though some reviewers note threads may loosen over time. The overall build aims for durability, with materials chosen to resist sagging and maintain shape under regular use.

Cleaning and maintenance are straightforward, with the cover being non-removable, so using a mattress encasement is recommended to protect against dust, mold, and stains, especially in humid environments. The bed-in-a-box format makes setup easy; it arrives compressed and expands to full size within a day, with minimal off-gassing smell that dissipates over time. The mattress includes a tool for safe unpacking, preventing damage during installation. Portability is aided by its manageable weight of 96.5 pounds, though it requires two people for movement. The design lacks handles, so lifting can be challenging. Durability is highlighted by reviewers who report the mattress bouncing back quickly after use and showing no significant indentations even with heavy users. The edge support system allows sitting on the sides without collapsing, though some note slight weakness over time. The materials are built to last, with many users expressing satisfaction after months of use, making it a reliable option for daily sleep.

Performance

In terms of comfort and support, the Crystli King Mattress performs well for a range of sleepers. Reviewers describe it as medium-firm, providing a balance that doesn't cause excessive sinking or feel overly hard. Many users report improved sleep quality and reduced back pain, with the hybrid design offering targeted support for proper spinal alignment. The motion isolation is effective, with pocketed springs minimizing disturbance from partner movement, making it suitable for couples. Edge support is strong initially, allowing users to sit on the sides without sliding, though some note it may weaken slightly over months. Temperature regulation is a standout feature; the cooling foam and breathable cover help prevent heat buildup, with reviewers mentioning it stays cool throughout the night. However, a few users sleep hotter on this mattress, indicating variability based on individual preferences. The mattress maintains its shape well, with no significant sagging reported even after prolonged use, contributing to its longevity and value.

Real-world durability is praised, with reviewers noting the mattress holds up under heavy weights, such as users over 200 pounds, without losing support. It resists indentations and bounces back quickly after pressure is removed. The bed-in-a-box expansion is reliable, reaching full height within a day, though off-gassing smell may linger briefly. Condensation or sweat is minimal due to the breathable materials. Trade-offs include its weight, which can make moving it difficult, and some users find the edges less supportive over time. Fit in standard king frames is good, but ensure proper support to avoid warranty issues. Overall, performance aligns with its affordable price point, delivering consistent comfort and cooling for most users. Reviewers highlight it as a budget-friendly alternative to higher-priced mattresses, with many willing to repurchase. Variability in firmness perception exists, so it may not suit those preferring very soft or very firm feels.

Pros and Cons

Pros

  • ✓Affordable price point for a hybrid mattress
  • ✓Medium-firm feel suits various sleeping positions
  • ✓Effective motion isolation for couples
  • ✓Strong edge support prevents sagging
  • ✓Cooling technology reduces heat buildup
  • ✓CertiPUR-US certified foams ensure safety
  • ✓Easy setup with bed-in-a-box delivery
  • ✓Durable construction resists indentations
  • ✓Helps alleviate back pain for many users
  • ✓Good value compared to higher-priced options

Cons

  • ✗Edges may weaken slightly over time
  • ✗Some users sleep hotter on this mattress
  • ✗Threads from cover can loosen with use
  • ✗Heavy weight makes moving difficult
  • ✗Off-gassing smell may linger initially
  • ✗Not ideal for those preferring very soft or firm feels
  • ✗Limited size variants in this model
  • ✗Cover is non-removable for washing
  • ✗May not support very heavy users over 300 pounds optimally
  • ✗Price fluctuations can affect affordability

Written by Sleep Mattress Guide Editorial Team. We research mattress specs, aggregate verified customer reviews, and distill it into clear buying advice.

(3) Comments

Outstanding Value and Durability for the Price
I purchased this mattress in early 2022 and have been extremely satisfied with it. The comfort and durability have surpassed my expectations, as it still rebounds quickly after use. I frequently sit on the edge, and to my surprise, it shows no signs of sagging or indentations. As a reference, I am 5'8" and weigh 200 lbs now, but I was around 240 lbs when I bought it, and it performed just as well then. If I need a new mattress in the future, I will definitely choose this same model. It offers a firm feel without being overly hard, and unlike my previous medium-firm mattress, it doesn't cause you to sink in, which I appreciate. This mattress is an excellent affordable option, particularly for someone like me—disabled, on a limited budget, and managing health issues that impact sleep quality. I use a mattress encasement to protect against dust and mold in my humid living environment. The only minor issue I've noticed is some loose threads from the diamond pattern when changing sheets, but this is not a significant concern for me.
Excellent Mattress with One Significant Drawback
I purchased this mattress after my usual store, Sears, closed. My 18-year-old son, who is 6'3" and around 280 pounds, was experiencing back pain from his old mattress. This mattress provided exceptional comfort and quality, immediately relieving his discomfort. It offers a great balance of plushness and support for a larger individual, which both my son and I confirmed. The affordable price and the 25-minute drive to the nearest store made it a worthwhile purchase. However, when I tried to buy another one for my other son, who is similar in size, the price had increased by over $130, making it comparable to store-bought options. At the original price, it's highly recommended, but at the current price, I suggest considering local alternatives.
Positive Experience After 6 Months
The mattress arrived well-packaged and was easy to unbox, with a handy tool included to safely open the plastic. It expanded quickly, reaching its full 10-inch height within a day, though a slight odor persisted temporarily. In terms of comfort, I rate it around 3.5 out of 10, as it doesn't sink much—ideal for my 5'9", 145-150 lb frame, significantly alleviating my lower back pain and improving sleep quality. I chose the 10-inch version as my first mattress-in-a-box purchase, but for taller individuals, like my 6'6" brother-in-law, the 12-inch option might be better for adequate support. Overall, it's a comfortable mattress, neither too soft nor too hard, and I'm satisfied with its performance. After six months, it has held up well, though the edges are somewhat weak, making sitting on them tricky, and I tend to sleep a bit warmer on it. While I'll keep it for a guest room, it has served me well and remains a solid choice.

Product Specifications

Product Dimensions 78.74 x 74.8 x 12.2 inches
Item Weight 96.5 pounds
Manufacturer Crystli
ASIN B09SV6X1MD
Item Model Number CY12-KI
Date First Available October 28, 2021
Age Range Description Adult
Mattress Type Hybrid (Memory Foam and Innerspring)
Firmness Level Medium Firm
Certifications CertiPUR-US Certified
Cover Material High-end knit fabric
Spring Type Pocketed carbon steel coils
Motion Isolation Yes
Edge Support Reinforced
Cooling Feature Air-flow foam layer
Delivery Format Bed-in-a-box
Warranty Not specified in input
Sleep Trial Not specified in input

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