do you need a box spring with a sealy mattress

14 Inch King Mattress in a Box, Gel Memory Foam & Individually Wrapped Pocket Coils, Medium Firm, Cooling, CertiPUR-US Certified

14in Queen Memory Foam Mattress, Queen Mattress in a Box for Cooling Sleep, CertiPUR-US Certified, Medium Firm, Motion Isolation, Strong Support

Avenco 10-in Medium Full Hybrid Memory Foam/Coil Blend Mattress in a Box

Queen Mattress, 14In Memory Foam Mattress in a Box,Pressure Relief Mattress, Zoned Support, Gel Layer for Cooling, Medium Firm, Improving Circulation

Itopfox Full Size Memory Foam Hybrid Mattress with Pocket Springs for Motion Isolation and Pressure Relief, CertiPUR-US Certified

PAGED Gel Memory Foam Mattress Hybrid Mattress with Pocket Spring for Comfortable Sleep

14 in Gel Memory Foam Mattress, King Mattress in a Box, Medium Firm Feel, Individually Wrapped Coils, CertiPUR-US Certified, Pressure Relieving

King Size Mattress, 14in Gel Memory Foam Mattress for Cooling Sleep and Pressure Relief, King Size Hybrid Mattress in a Box

Okak Gel Memory Foam Mattress, Mattress in a Box with Anti-Microbial Cover, Breathable Mattress with Open Cell Foam for Home

QingMoon Mattress, Medium Firm Hybrid Mattress in a Box, with Memory Foam and Individually Pocket Innerspring for Cooler Sleep and Pressure Relief

Memory Foam Mattress in a Box, 14inch King Size Mattress for Cool Sleep & Pressure Relief, Medium Firm

Dyonery 8-10 Inch Mattress Fiberglass-Free, Green Tea Gel Memory Foam Bed with Tencel Cover, Breathable Medium Firm Support for Back

14" King Size Mattress in a Box, Memory Foam and Pocket Innerspring Mattress for Motion Isolation, Medium Firm, Pressure Relief

Atlas Mattress Memory Foam Mattress in a Box, CertiPUR-US Certified and Medium Firm

ORRD 12 Inch Full Hybrid Mattress in a Box - Medium Firm with Pocket Coils for Pressure Relief, Motion Isolation & Breathable Cool Sleep

Arceso Cal King 12" Cooling Charcoal Memory Foam Mattress, Medium Firm in a Box for Back Pain Relief, CertiPUR-US Certified

IHOMEADORE 6-inch Twin Size Pocket Spring Mattress

CSBDHOME 12 Inch Cooling Gel Infused Mattress for Pressure Relief, Bed in a Box CertiPUR-US Certified & Fiberglass Free

Dyonery 10" RV Mattress Cooling Green Tea Gel Memory Foam, Tencel Cover, Medium Firm & CertiPUR-US Certified for Campers/Trailers (Bed-in-a-Box)

Sailvan Full Memory Foam Mattress Size, 10 Inch Cooling Gel Memory Foam Mattress in a Box, Medium Firm

YARDGRACE Twin/Full/Queen/King Size 10/12 Inch Hybrid Mattress with Gel Memory Foam, Individual Pocket Spring

Vipbear 8/10-inch thick multi-size memory foam mattress, Tencel covered, top-quality cooling green tea/gel, boxed, deep sleep mattress, white

Vipbear RV Mattress, Tencel Cover, Premier Cooling Green Tea/Gel Medium Firm Mattress in a Box, Back Supportive,Made in USA

Decksplore 10 Inch Green Tea Memory Foam Mattress Medium Firm Gel-Infused Cooling Bed in a Box