The bottom of the cover is clearly polyester. So it does not offer the legitimate breathability and cooling of 100% bamboo. I thought I was buying something unique from this site but this topper is unbranded elsewhere, including bed bath and beyond and wayfair, where the wayfair description clearly states the bottom of the cover is polyester.

Thank you for this mattress pad. It's really soft and fresh. Help to stay cool all the night. We really like it !!!

WONDERFUL !!!!I DON'T PUT A FITTED SHEET OVER IT BECAUSE IT FEEEELS SOOOOO NNNNNIIIIICCCCEEEE!!!!!

The mattress I am currently using has grown old with me and I now feel that the mattress isn’t giving enough support while sleeping. Plus, the comfort level is also decreased. So, I was looking for a mattress pad that can enhance comfort as well as give better support.
I jumped onto the internet to find a good quality mattress topper and the very first product came in front is this bamboo mattress topper. What! Yes, I was also wondering if it would be the right solution. As this is made of bamboo fiber, how would it react in terms of support and comfort?
I called the customer service of Down Under Bedding and they gave a whole lot of information about this bamboo mattress topper. I was totally convinced and decided to buy this for the experiment. It reached at fairly good packaging and necessary care instructions were there.
After started using it, I felt that my bed is no longer heating up more than necessary. The bamboo mattress topper was regulating the temperature with its high breathability. The result was a dry and cool sleeping ground which I was missing for so long. Thanks to the mattress topper.
The moisture control of this mattress topper is excellent. As bamboo has natural antibacterial protection, this mattress topper provides a healthy sleeping surface. Regardless of the season, this mattress topper was always ready to give me the ultimate comfort.
Though I think this mattress topper has a cheaper look than its competitors, it is still a pretty good deal at this price point. Down Under Bedding has done a great job on this product to make it look better and perform better. If other products of them are as good as this, I am definitely going to them from now on.

It’s well made and silky soft like anything made of 100% bamboo. I’m switching to bamboo because cotton is such a toxic crop and is horrible for the environment - and most places have a bamboo combination not 100% bamboo so bravo to this company. Girl in customer service said she would wash on permanent press cycle even though says dry or spot clean. And I’ll hang it out to dry naturally but I DO plan on washing it every time I change sheets. It’s a lovey product, fingers crossed it holds up to laundering!