Do Mattress Protectors Shrink?

Cotton components can shrink, while heat can also damage laminated waterproof layers. Construction and care instructions both matter.

Organic cotton may be deliberately oversized

Sleep & Beyond has published that its organic cotton protectors are made slightly larger to account for expected cotton shrinkage.

Protect the membrane

Do not assume hotter drying is a useful way to force a better fit. Excess heat can damage waterproof laminates.