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PACKAGE INCLUDES: 24 mesh zipper pouches in 8 different colors, red, orange, yellow, green, light blue, dark blue, violet, black, 3 pcs for each color, these zipper bags can help organize documents.
PRODUCT SIZE: The puzzle bag is 13.5" x 9.5"/34.3cm x 24.1cm. Larger A4/letter size paper. Please confirm the product size before purchase.
QUALITY PVC: These mesh bags with zipper are made of PVC, safe and thick mesh, waterproof and moisture-proof. Protect your files from moisture, keep them flat and clear. Smooth metal zipper, strong and sturdy.
SUPER LARGE CAPACITY: These plastic project file folders with super large capacity, they big enough and have many uses, it is a good choice as office supplies, students organize, board games storage, wooden puzzles organizing, traveling storage, or for diaper bag organizing pouches.
SIMPLE STORAGE: Make office storage easier; Help you organize documents and office supplies accurately and efficiently. It is the best choice for makeup artists,college students,elementary school students, office workers and classrooms.

Product description

Are these waterproof or splash proof? Can they be submerged in shallow water without leaking through zipper?

The plastic part is absolutely waterproof, but the zipper part will seep. They are sufficient to cope with the splashes of life and office scenarios.
Is these mesh zipper pouch sturdy？

Yes, they are pretty sturdy.
Is this a smooth vinyl surface, or bumpy mesh?

It's a mesh surface.