SIWA offers ultralight, water resistant, and non-tearable Washi paper products such as tote bag, pencil case and book cover. Entirely made by hand in Japan.
Fits A5 sized book or notebook (210×148mm, up to 30mm thickness)
I’m using the cover for my Hobonichi cousin. It fits well (though doesn’t have quite as much room for growth as I’d thought) and is very minimalist, having pretty much no impact on bulk or weight. The texture is soft and luxurious and I love the colour.