The Umbrellas are all water resistant. The different collections use different materials:
The Paradise Island umbrellas are made from a Poly/cotton material, water resistant.
The Nepalese hand painted are a plastic material, so water proof.
The Thai cotton weave, are knitted wool/cotton, they don’t shrink but best to not leave out in the rain for to long
The Shangri La collection is a cotton cloth but prepared with an outside layer of pine oil wax and other traditional glue coatings, making the parasol water resistant. The glue is made from the seeds of a fruit, traditionally used to ensure that the cloth remains hard and strong for long time.