Customer reviews for Serta Perfect Sleeper X Knox Hybrid Mattress

Skip to Main Content

All Departments

Savings Center Limited-Time Offers Spend More, Save More Apparel Sam's Cash Promotions Clearance Grocery & Household Savings Home Savings Electronics & Office Savings Health & Beauty Savings Clothing & Accessories Savings Baby Savings Shop All Savings

Grocery

All Grocery Easy Meal Ideas Meat, Poultry & Seafood Pantry Frozen Food Snacks Produce Beverages Bread & Bakery Deli Dairy, Eggs & Cheese Candy Breakfast Custom Cakes & Cupcakes Alcohol Fresh Flowers

Halloween

Decor

All Decor Indoor Decor Outdoor Decor

Be Halloween Ready

Candy Costumes Halloween Inspired Clothing Halloween Toys Halloween Finds

Shop By Theme

Fall Everything Pumpkins Skulls & Skeletons Bats & Spiders Ghosts & Ghouls

The Holiday Edit

The Holiday Edit

Christmas Decor

Shop all Decor Christmas Trees Christmas Lights Ornaments

Holiday Gift Guide

Shop Gift Guide Toys by Age Beauty Electronics Clothing, Shoes & Accessories Home

New Arrivals

All New Arrivals All New Items Online Only Treasure Hunt Trending Items

New Member's Mark

New Member's Mark

New Apparel

All New Apparel New Baby Apparel New Children's Apparel New Men's Apparel New Women's Apparel New Jewelry

New Baby New Beauty New Books New Electronics New Fragrance New Gaming New Grocery New Health New Home New Household Essentials New Kitchen Appliances New Outdoor & Patio New Sports & Fitness New Toys

Member's Mark

All Member's Mark Join the Community Goals & Commitments Made Without Home Baby & Kids

New Arrivals

All New Arrivals Grocery Home Toys Outdoors

Clothing & Accessories

All Clothing & Accessories Women's Men's Kids

Grocery

All Grocery Fresh Sushi Bakery & Bread Charcuterie Board Deli Meat & Seafood Frozen Foods Pantry Foods Coffee & Beverages Wine & Liquor Desserts & Sweets

Member's Mark Essentials

Health & Personal Care Eyewear & Optical Care Household Care Office & Tech Pet Supplies

Live Well Your Way

Live Well Your Way

All Live Well Your Way

Wellness Routine

Activewear Fitness Equipment Fitness Tech Member's Mark Activewear Spa & Massage

Daily Support

Multivitamins Sleep Support Supplements

Healthy Alternatives

Simplified Nutrition Member's Mark Made Without Gluten-Free Organic Food Protein Reduced Sugar

Clothing, Shoes & Accessories

Clothing, Shoes & Accessories

All Clothing, Shoes & Accessories New Items Fall Clothing Outerwear Clothing Sports Team Clothing Women's Clothing Men's Clothing Kid's Clothing Baby & Toddler Clothing Shoes Jewelry Fragrances Handbags Featured Brands

Savings

Spend More, Save More Apparel Clothing & Accessories Savings Jewelry Savings

Baby & Toddler

All Baby & Toddler Diapers Baby Wipes & Essentials Baby Gear Baby Feeding Baby Health & Safety Nursery & Furniture Baby & Toddler Clothing Books Postpartum Care Baby Shower

Featured

The Fall Home Edit Weather Prep Supplies

Home

All Home New Items Member's Mark Home Kitchen & Dining Furniture Mattresses Bedding Bath Vacuums & Floorcare Appliances Home Improvement Storage & Organization The Weekend Workshop Outdoor & Patio

Savings

Appliances

All Appliances Refrigerators & Freezers Washers & Dryers Ranges & Stoves Dishwashers Microwaves Kitchen Appliances Air Purifiers Wine & Beer Coolers Vacuums & Floorcare Heating & Cooling Water Dispensers Compact Appliances

Savings

Samsung Buy More Earn More Sam's Cash

Shop By Brand

LG Samsung Frigidaire Gallery Hamilton Beach Kenmore Forno NXR Thor Kitchen

Household Essentials

Household Essentials

All Household Essentials Laundry Supplies Cleaning Supplies Foils, Wraps, & Bags Disposable Tableware Paper Towels & Napkins Toilet Paper & Wipes Air Fresheners Batteries Professional Cleaning Supplies Restaurant Supplies Pet Supplies Member's Mark Household Essentials Shop For Your Business

Electronics & Gaming

Electronics & Gaming

All Electronics Buzz Worthy Tech New Gaming Releases Televisions & Accessories Cell Phone Accessories Audio Printers & Scanners Computers iPads & Tablets Wearable Technology Gaming Smart Home & Security Savings

Shop by Brand

Vizio Samsung LG Apple Sonos CurrentBody ASUS Govee Bose Beats Shokz hp Oura

Outdoor & Patio

Featured

Outdoor Savings Weather Prep Supplies

Outdoor & Patio

All Outdoor & Patio New Items Outdoor Seating Outdoor Dining Sets Outdoor Shades & Structures Outdoor Decor & Accents Outdoor Lighting Outdoor Grilling & Cooking Spas, Saunas & Cold Plunges Sheds & Outdoor Storage Lawn & Garden Outdoor Play

Sam's Garage

All Auto & Tires Tires Specialty Tires Automotive Batteries Windshield Wipers Sam's Fuel Auto Accessories

Tires by Brand

Goodyear Tires Pirelli Tires Bridgestone Tires BFGoodrich Tires Firestone Tires Michelin Tires Cooper Tires Toyo Tires Falken Tires

Pharmacy, Health & Wellness

Health & Wellness

All Health & Wellness Allergy & Sinus Cough, Cold & Flu Probiotics & Fiber Vitamins & Supplements Over the Counter Protein & Nutrition Essentials Pain Relief Eye Care Optical Center Hearing Solutions Smoking Cessation Aids

Telehealth

Telehealth GLP-1 Weight Solutions 24/7 Virtual Care Weight Watchers

Pharmacy

All Pharmacy Pharmacy Price Check GLP-1 Support Sam's Club RX Delivery Smart Health Pet Medication Spot Pet Insurance

Featured Shops

HSA & FSA Shop Women's Health Men's Health Kids' Health Senior Home Care Essentials Postpartum Care Member's Mark Wellness Support

Beauty

All Beauty Premium Beauty New Beauty Beauty Gifts Hair Care Makeup Bath & Body Skin Care Fragrance Sun Protection Men's Grooming

Personal Care

All Personal Care New Beauty & Personal Care Bath & Body Oral Care Hair Care Skin Care Deodorant Incontinence Sun Protection Feminine Care Men's Grooming Shave Hand Sanitizers Postpartum Care FSA & HSA Shop

Jewelry & Accessories

Jewelry

All Jewelry & Watches New Items Wedding Ring Shop Lab Created Diamonds Gemstones Handbags Fragrances

Savings

Jewelry Savings

Sports & Fitness

Sports & Fitness

All Sports & Fitness New Items Camping & Outdoor Recreation Hunting & Fishing Coolers Outdoor Apparel & Gear Fitness Equipment Sports Equipment Saunas & Cold Plunges

Featured

Sports Fan Shop The Golf Shop

Toys & Games

Costumes Outdoor Play Educational & Creative Toys Sensory, Fidget & Squishy Toys Plush, Dolls & Dollhouses Building Sets & Blocks Games & Puzzles Action Figures & Collectibles RC Vehicles & Action Toys Gaming Toys by Age New Items Sam's Exclusive Toys Character Shop

Pet Supplies

All Pet Supplies Member's Mark Pet Supplies Dogs Cats Pet Accessories Flea & Tick Care Pet Supplements Wildlife Supplies Gifts for Pets Smart Pet Pet Clean Up Pet Medication Spot Pet Insurance

Office

All Office Office Technology Office Furniture Folding & Stackable Furniture Arts & Crafts Shipping & Moving Supplies Professional Cleaning Breakroom Supplies Retail Signage Tax & Finance

Seasonal & Celebrations

Seasonal & Celebrations

Halloween Fall Everything Game Day Central Back to School Live Well Your Way

Party Supplies

Party Prep Appetizers & Party Trays Snacks

Gift Guide

Gifts under $25 Toys Gift Cards Graduation Gifts

Gift Cards

Shop Gift Cards by Category

Up to 25% Savings Restaurant Entertainment AMEX, Visa and MasterCard Retail Travel Sports Tickets Gaming Sam's Club Gift Cards

Shop by Occasion

Birthday Congrats Thank You Baby Just Because Wedding Workplace

Flowers & Gifts

Featured Categories

All Flowers & Gifts Jewelry Fresh Flowers Gift Baskets & Gourmet Food DIY Gift Baskets Wedding & Engagement Rings Gift Cards Watches Fragrance Wine Handbags Beauty Gifts Baby Shower

Books

All Books New Books Adult Books Teens & Young Adult Books Kids Books Fiction Non-Fiction Religious & Spirtuality Cooking

Shop For Your Business

Shop For Your Business

Shop All Restaurant Supplies Vending Machines Concession Professional Cleaning Supplies Place a Truck Order Become an Export Member

Sam's Garage

All Auto & Tires Tires Specialty Tires Automotive Batteries Windshield Wipers Sam's Fuel Auto Accessories

Auto & Powersports Buying

Auto & Powersports Buying

Auto Buying Powersports & Golf RV Buying Boat Buying Tire & Battery Center Battery Finder Sam's Fuel

Pharmacy & Health Services

Pharmacy

Pharmacy Home Refill Prescriptions Transfer Prescriptions Check Prescription Prices Prescription Delivery

Health Services

GLP-1 Support Telehealth Humana Dental Plan Pet Medication Spot Pet Insurance Weight Watchers

Vaccines

Schedule Vaccine Vaccine Information

Vision, Hearing & Wellness

Vision, Hearing & Wellness

Optical Center Dental Hearing Solutions HSA & FSA Shop

Photo, Cards & Gifts

Photo, Cards & Gifts

Halloween Shop Prints Cards & Stationery Canvas & Wall Art Photo Books Calendars Home Decor & Photo Gifts

Custom Cakes & Cupcakes

Custom Cakes & Cupcakes

Fully Custom Cakes Premade Desserts Birthday Cakes Character Cakes Wedding Cakes Floral Cakes Baby Shower Cakes

Travel & Entertainment

Travel & Entertainment

Sam's Club Travel New! Cruises Hotels Theme Parks Rental Cars Shows & Events

Home Services

Home Warranty Water Delivery Energy Solutions Home Improvement Angi Assembly & Installations

Installation & Protection Plans

Installation & Protection Plans

Angi Assembly & Installations Allstate Protection Plans

Wireless

T-Mobile Cell Phone Accessories

Business Services

Business Services

POS Solutions Check Printing Affiliate Program Truckload Orders Become an Export Member

Club Services

Same Day & Express Delivery Scan & Go Curbside Pickup Sam's Credit Card Sam's Club APP Sam's Fuel Find A Club

Customer reviews for Serta Perfect Sleeper X Knox Hybrid Mattress for

Serta Perfect Sleeper X Knox Hybrid Mattress

Back to item details

4.7 out of 5 stars

stars

264 ratings264 reviews

Sort by |

Showing 231-240 of 264 reviews

May 4, 2025

Reviewer name: Madina M

5 out of 5 stars

5 out of 5 stars review

Amazing

Great for a restful sleep

Review from Serta

Helpful?

Mar 1, 2025

Reviewer name: Kevin C

5 out of 5 stars

5 out of 5 stars review

Love our new bed!

Woke up with my back feeling better than it has in years!

Review from Serta

Helpful?

Jun 5, 2025

Reviewer name: Erika P

5 out of 5 stars

5 out of 5 stars review

Excellent Mattress

So very comfortable and cool!

Review from Serta

Helpful?

Oct 11, 2025

Reviewer name: Marsha M

5 out of 5 stars

5 out of 5 stars review

Great mattress

Comfortable, great night sleep

Review from Serta

Helpful?

Oct 15, 2025

Reviewer name: Teresa H

3 out of 5 stars

3 out of 5 stars review

Disappointing

Already showing body imprints. Not really "cool" sleeping. It's just ok.

Review from Serta

Helpful?

Oct 13, 2025

Reviewer name: Bertha S

5 out of 5 stars

5 out of 5 stars review

Serta

I like a firm mattress and this fits my needs

Review from Serta

Helpful?

Feb 10, 2025

Reviewer name: Antonino B

5 out of 5 stars

5 out of 5 stars review

firm mattress

Comfortable sleep

Review from Serta

Helpful?

Sep 2, 2025

Reviewer name: James G

5 out of 5 stars

5 out of 5 stars review

I bought your mattress because I liked it.

Firm and supportive!!

Review from Serta

Helpful?

Feb 18, 2025

Reviewer name: Kathleen B

4 out of 5 stars

4 out of 5 stars review

Full mattress

Feels good

Review from Serta

Helpful?

Jan 18, 2025

Reviewer name: Deborah M

5 out of 5 stars

5 out of 5 stars review

New bed

Very comfortable.

Review from Serta

Helpful?