do you need a box spring with a sealy mattress

VECELO Queen/King Size Bed Frame with Wooden Headboard, Metal Bed Platform No Box Spring Needed with Heavy Duty Steel Slat, Brown

Allergy Free Zipper Mattress or Box Spring Encasement

Continental Sleep, 13-Inch Firm Heavier Pocket Coil Spring Hybrid Mattress, Motion Isolation with Durable Support, Bed in a Box, Beige

Continental Sleep 14 inch Quickbase Metal Mattress Platform Bed Frame Foundation with Steel Slats (No Box Spring Needed), Black

Olivia Platform Bed in Velvet - Threshold™

Kelsey Upholstered Platform Bed in Boucle - Threshold™

Machine Washable Quilted Mattress Pad - Room Essentials™

ChaletPosh Wooden Box Spring

Adaline Upholstered Bed with Arched Headboard in Boucle - Threshold™

HOMCOM Bed Frame with Headboard, Size Bed Frame with Lights, Charging Station, Storage Shelf, Noise-Free & No Box Spring Needed, Walnut

Piperton Tent Complete Bed In Box - Signature Design by Ashley

Dori Upholstered Platform Bed Frame with Wingback Headboard Gray - Zinus

Zinus King Ibidun Upholstered Platform Bed Frame Light Brown: Steel Frame, No Box Spring Needed, Easy Care

Sealy Cotton Cozy Rest 2-Stage Crib And Toddler Mattress

Adaline Upholstered Bed with Arched Headboard Linen - Threshold™

Antwerp Upholstered Wingback Bed - Threshold™

Austin Wingback Bed in Velvet - Threshold™

Antwerp Upholstered Wingback Bed in Velvet - Threshold™

Mory Metal Platform Bed Frame with Split Headboard Brown - ZINUS

Bed Frame with 6-14in Metal Platform, No Screws Needed, No Box Spring Needed, Heavy Duty,

Allergy Free Zipper Mattress or Box Spring Encasement

Emma and Oliver 12 Inch Hybrid Memory Foam Pocket Spring Mattress, Mattress in a Box

Bed Frame King Size, 10 Inch Metal Platform, No Screws Needed, No Box Spring Needed, Heavy Duty, 800 Lbs Capacity, Reinforced Iron Slats & Legs