JusArt
JusArt Water Brush Pens (6-Pack)
Best for: Urban sketchers and water-soluble pencil users who paint on the go

Canson
A 9 x 12 inch pad of 30 heavyweight 140 lb watercolor sheets with a cold press finish, acid-free paper and a foldover binding.
Best for: Painters who want a pad of acid-free cold press watercolor paper
The Canson XL Watercolor Pad is a 9 x 12 inch pad of 30 sheets of heavyweight white 140 lb paper. The sheets have a cold press finish, which Canson calls a durable surface, and the pad has a foldover binding.
The listing says the paper is acid-free. It does not state the fiber content, so it does not claim cotton. One listing bullet mentions a 12 x 19 inch pad, but the title and size say 9 x 12 inches with 30 sheets.
Based on the manufacturer's Amazon listing.
Canson lists the paper as heavyweight, at 140 lb.
Canson calls the cold press finish a durable surface. Cold press paper generally has a light texture, while hot press is smooth.
The title lists 30 sheets in a 9 x 12 inch pad.
The listing says the paper is acid-free. Acid-free paper is made to resist yellowing over time.
Pages fold back over the top of the pad, so you can keep working through it.
Look elsewhere if: you want 100% cotton paper. The Arches Hot Press Watercolor Pad lists 100% cotton.
Canson XL Watercolor Pad
Choose it for: A foldover cold press pad
Soucolor Watercolor Paper Pad 9x12
Choose it for: More sheets in the same size
Arches Hot Press Watercolor Pad
Choose it for: 100% cotton, hot pressed
JusArt
Best for: Urban sketchers and water-soluble pencil users who paint on the go
ABEIER
Best for: Beginners and students trying gouache on watercolor paper or canvas
DOODLE HOG
Best for: Beginners, letterers and illustrators who blend with water brushes
Soucolor
Best for: Painters of all levels working in watercolor, acrylic or mixed media