No noticeable outgassing. So you don't breathe in volatile organic compounds all night long. In the age of respiratory diseases, this is an important feature. Watch out for the zipper though. If you use it on an air mattress and it is very narrow, you will delay the mattress inflation. I ordered 2 of these a year ago and they still work great, work every day and during that time they have not been removed for washing every 5 days. The two I've ordered in the last 3 months both got stuck on the zipper end and I couldn't remove the lid without cutting the zipper.
2-Pack Twin Size Mattress Protectors With Waterproof And Cooling Features - Soft Bamboo Cover, 3D Air Design, Noiseless And Breathable Mattress Pad, Fitted For 8-18 Inch Deep Pockets
18 Review
Protect Your Twin Mattress With Zippered Waterproof Encasements - Twin 2 Pack Included
14 Review
Twin Size Zippered Mattress Protector Encasement - Premium Terry Absorbent Cover With Six-Sided Waterproof Protection - Quiet, Breathable, And Fully Washable
43 Review
Waterproof Twin XL Mattress Encasement With Zippered 6-Sided Cover, PlushDeluxe Premium Quality, And Cotton Terry Surface (Fits 12-15 Inches H)
14 Review
Stylish Bracelet Replacement Band With Diamonds For Fitbit Versa 2 Smart Watch - Compatible With Fitbit Versa, Versa Lite, And Versa 2 Bands For Women - Silver
28 Review
Heavy Duty Waterproof Aozzy Air Conditioner Cover For Outdoor Window Units With Adjustable Straps - 17" W X 12" D X 13" H Inches
31 Review
Stylish Solid Stainless Steel Metal Strap Replacement Band For Fitbit Versa 2, Versa Lite, Versa SE - Compatible With Men And Women - Black
31 Review
Black 2-Pack Of Vivere EFHTS Accessories For Hammocks
27 Review