Hi Kay,
I saw the screenshot and yes, I would recommend making space in your page design so that you can have a unique H1 (main heading/the most important headline) properly created for each of your pages. The H1 not only helps the search engines figure out what a page is about, but how a page is structured as well. The same goes for screen readers. This is why it is still best practice to make the H1 the main headline of the page, vs. a navigational element (with one unique H1 per page).
While the importance of using a keyword-rich H1 has declined over the years as a page ranking factor, it still carries some weight. That said, when writing H1s (and title tags), it's always wise to consider what will be most helpful for the user. (And that is often if not always the same thing that is helpful for the search engines!)
I agree with Andy that on an ecommerce site, if the heading for the page is a product name/type (or contains the product name/type), then this usually makes a good H1. I also agree that you should place it in the main body of the of the page, not the navigation. (Usually the
tag is placed right after the opening tag.) I partly disagree with him that this shouldn't be a copy of a the title tag. I've found that using the same copy for the title and H1 tags (for the same corresponding page) is good for the user experience, and can reduce pogo sticking. So when the user clicks on a title in the SERPs through to a page with the same heading, it is obvious they found the right page. They clicked on the search result they thought looked good, and this page is obviously about the same thing... this is the page they want. Does that make sense?
If using the product name/type for the H1, though, will not give you a compelling title tag (or a super short one), I would recommend sticking with the product name/type for the H1, and incorporating the same copy into the title tag (i.e., adding on to it, which could be as simple as adding your brand name).
I hope this helps!
Christy