I have a few suggestions as well, mostly related to content.
Do you have more product photos? I see a few on the actual product page - can you use those on the landing page as well? More photos will create more engagement on the page and could help visitors fall in love with the product.
Do you have any happy customer testimonials or reviews/ratings that you can add as social proof?
How specific are the ads that drive visitors to this page? It only features blue sheets in the double size. The dropdown menus for size and color don’t appear to have any other options.
Finally, do you have a way to measure the conversion rate on the landing page (the % of people that click through to the full site) and the conversion rate of the full site itself? Your true conversion rate for your search and FB ads campaigns will be the product of these two numbers (LP conversion rate X site conversion rate). You’ll have to measure both very closely to see if the LP actually improves your overall conversion rate enough to offset the abandonment on the landing page.
Landing pages for e-commerce are tough but can be done well with a lot of testing. Good luck!