Saqib zafar is simply the best and no it is not waterproof but it depends on the type of polyester/ but im right because most of them are not waterproof.
nylon
polyester
no denier mean the density and fibre of the fabric
The mattress pad is soft. it has a 50% cotton and Polyester top.
The laminate of a waterproof mattress generally will not hurt a child. The only danger would be if your child had a allergy to the material.
Ski outfits are primarily made out of tightly woven polyester or nylon which helps keep it waterproof and if the suit is insulated it may be down or more polyester.
The ballistic nylon will be a higher denier (thickness of the thread). Also will be shiny/glossy compared to the matte finish of polyester. Ballistic nylon will be much more durable and much less likey to tear or scuff. You can get higher denier polyester (900, 1200, 1800) which will be better for wear and tear. The price will reflect this however as 600d poly is low to mid price point whereas the others are higher.
Waterproof fabrics are generally very difficult to sew and need to be stitched by machine instead of by hand. The same qualities that make the fabric resistant to water also make the fabric resistant to the needle and thread.
Depending on where the blankets are needed for, whether it's the backseats or the trunk, there are many choices. Most of these are made of polyester and are waterproof.
The braided rope is better because it is made from nylon or polyester. It can hold heavier weights than a regular rope. It can stretch and some polyesters are waterproof.
Tracksuits are made with synthetic fibers. It is manufactured with a combination of cellulose triacetate and polyester. There are also track suits that are waterproof and coated in nylon or PVC.