Sleep Joy 4″ ViscO2 Ventilated Memory Foam Mattress Topper Review

If you are looking for a non-heat retaining memory foam mattress topper this is your choice. This Sleep Joy memory foam mattress topper is a 4 inch thick topper with lots of features to ensure air circulation. It has hundreds of vertical holes drilled through the foam to make sure proper air movement is there. Its three zones of air channels allows five times airflow compared to other memory foam mattress toppers.

Sleep Joy 4″ ViscO2 Ventilated Memory Foam Mattress has a density of 3 pounds per cubic feet. This is a good density for a 4 inch mattress topper. This is good enough to provide adequate body support as well as comfort. When you lay on it your body heat will soften the memory foam and it will adjust its shape to the contours of your body. This provides cradling comfort and at the same time remove pressure points. The three zones of air channels helps to maintain good air flow throughout the mattress topper and help to keep it at room temperature.

Sleep Joy 4″ ViscO2 Ventilated Memory Foam Mattress Topper Details:


Mattress Size – Twin size (Also available in sizes Twin XL, Full, Queen, King, California King)
Density – 3 pounds
Product Size – 73x37x4 inches
Origin – USA
Weight – 19.2 pounds

Rating – 4.2/5


This product was reviewed by 282 customers out of which 184 people gave it five stars.

Does it have a bad odour?

The foam has a very mild odour. Most customers reviewed that the odour goes away completely within a few days.

Can it be used to sleep on the floor?

Sleep Joy 4″ ViscO2 Ventilated Memory Foam Mattress Topper has a density of 3 pounds which is good enough to provide good support. However unless you are a lightweight person it is not recommended to be used on floor.

Read the article on the best memory foam mattress toppers reviews

Does it come with a cover?

No, you will have to buy one separately for this. It is not necessary but using a cover will keep the mattress topper stain free.

Is it easy to handle?

It is lightweight but you will have to handle it carefully. It has lots of holes drilled through the memory foam to allow air ventilation. If you carelessly handle the topper it is likely to get torn.

How long does it take the foam to fully expand?

It takes around 48 hours for the foam to fully spread

Does it help to reduce body pain?

It is a 3 pound density memory foam mattress topper, this density is good enough to give your body adequate support. According to most customers this topper is  great for reducing back pain.

Does it have warranty?

It comes under two years of limited warranty.

Is this topper a single block of foam or two 2 inch thick toppers together?

Unlike many other mattress toppers which claims to be 4 inch thick, this Sleep Joy 4″ ViscO2 Ventilated Memory Foam Mattress Topper is really a single block of 4 inch memory foam.



  • Good density
  • Plenty of  air circulation
  • Available in different sizes
  • Good body support
  • Less odour for the foam compared to others



  • Likely to get torn along the drilled holes if not handled carefully
  • Lower durability than other mattress toppers



Find out the best mattress reviews

The main attraction of this Sleep Joy 4″ ViscO2 Ventilated Memory Foam Mattress Topper is that it allows lots of air circulation. So it is a lot more comfortable than other mattress toppers in terms of sleeping hot. it provides good comfort and good body support and is suitable for most people.

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