Linenspa

Pros

• Gel-infused memory foam for moderate cooling
• 3-inch profile meaningfully softens firm mattresses
• Inexpensive way to soften a too-firm mattress

Cons

• Off-gassing smell for 24-72 hours after unboxing
• Less responsive than latex toppers

Pros

• 300 gsm all-season microfiber fill in a box-stitched quilt
• Eight corner and side loops hold a duvet cover in place
• Machine washable, with a 3-year warranty against defects

Cons

• Some owners find it thinner than expected
• Durability complaints include seams tearing in the wash

Pros

• Very low price
• Thin, smooth brushed-polyester top changes the mattress feel very little
• 10-year limited warranty

Cons

• Fits mattresses only up to 14 inches thick
• Some owners report leaks or a plastic-like sound