How to Buy a Mattress Online: A Step-by-Step Buyer's Guide
Buying a mattress online saves money and skips the showroom pressure — if you know what to check. Here's the full process from research to delivery.
Published 2/15/2025
Step 1: Identify your sleep profile
Sleep position is the single biggest factor. Side sleepers need pressure relief at the shoulder and hip; back sleepers need lumbar support; stomach sleepers need a firmer surface to keep hips from sinking.
Body weight changes how a mattress feels by 1-2 firmness levels. Lighter sleepers experience mattresses as firmer; heavier sleepers experience them as softer.
Temperature, partner motion, and back/joint pain are the next three filters. Write them down before you start shopping.
Step 2: Pick a mattress type
Hybrid (foam + coils): The most versatile choice. Good for hot sleepers, combination sleepers, and anyone who wants edge support and bounce.
Memory foam: Best for strict side sleepers, light-to-average weight sleepers, and couples sensitive to motion.
Latex: Bouncy, durable, naturally cool. More expensive and heavier than foam or hybrid.
Innerspring: Cheapest and most traditional, but typically lacks pressure relief.
Step 3: Verify the trial, warranty, and shipping
Sleep trial of at least 100 nights is the industry standard for online mattresses — your body needs 30 days to adjust.
Warranty should cover sagging deeper than 1 inch for at least 10 years.
Free shipping and free returns are standard. Watch out for restocking fees or 'donation requirements' that make returns hard.
Step 4: Set up correctly on day one
Use a sturdy foundation: a slatted base with slats no more than 3 inches apart, a box spring rated for foam/hybrid, or a platform bed.
Let the mattress decompress for 24-48 hours before sleeping on it (for compressed/boxed mattresses).
Rotate head-to-foot every 3 months for the first year to even out wear.
Frequently asked questions
- Is it safe to buy a mattress without trying it in person?
- Yes — that's exactly what the 100-night sleep trial is for. Online mattresses are returnable, while showroom purchases usually aren't. You get more time to evaluate fit at home than the 5 minutes you'd spend in a store.
- How long does an online mattress last?
- A quality hybrid or latex mattress lasts 8-10 years; memory foam typically 6-8 years; innerspring 5-7 years. Look for a 10-year warranty as a baseline.
- Do I need a box spring for an online mattress?
- No, in most cases. Modern hybrid and foam mattresses are designed for platform beds or slatted bases. Adding an old box spring can void the warranty.