On their official club website Liverpool have described the new product in the following way:

KOP Rising
Celebrating the community that cheers for Liverpool FC and those who travel far and wide brandishing banners, booming voices and unwavering pride, we’ve added removable hook-and-loop patches that let you rep your team.

Match Your Team’s Kit
Colours and other fun, discoverable details to match your kit (like custom sockliner and bootie graphics) give you the edge above the competition.
Inspired by water-skiing, the upper’s stretchy fabric hugs your foot for an incredible feel.
Originally designed for performance running, Nike Air cushioning delivers lasting comfort.
Caged heel adds support and pairs with elongated tongue to keep the early ’90s look you love.
Cushioned inner sleeve stretches to your foot for an oh-so-personalized fit.