Hi,
Great idea for a class.
Concerning your product I don’t see a lot of product differentiation here, it looks fairly generic and if you want to appeal to a niche audience, you have to more actively do so especially with online retail channels.
Also portability is key and in that sense this product can benefit by making it more into a shoulder bag for example. This way you need the backpack anyway to store this sleeve in!
Your visualizations are good, your product photography can be much better.