There's really no telling. As soon as people were able to weave cloth enough for it to be turned into everyday clothes, people have been looking at ways of making it waterproof. And before that, people tried to figure out how to make leather waterproof as well, usually by greasing them heavily.
Kevlar is a fiber that is knitted or woven into a material/fabric. Those materials can be laminated to be made waterproof, but Kevlar in and of itself as a finished good is not waterproof.
Cashmere is not waterproof but you can put on a special fabric finish that can make it waterproof.
Waterproof is a noun (this material or fabric is impervious to water) but also it is an adjective (this watch is waterproof = made of or coated or treated with rubber, plastic, or a sealing agent to prevent penetration by water).
To make fabric waterproof using fabric stiffener, you can apply multiple layers of the stiffener to the fabric and allow it to dry completely. This will create a protective barrier on the fabric that repels water.
I doubt that lamb handbags are waterproof. Lamb is just a type of fabric and no real material or fabric is waterproof without the help of a solution or chemical.
Not all types of calico fabrics are waterproof, but there are certain waterproof calico fabrics.
Fleece is not inherently waterproof; it is typically made from synthetic materials like polyester or nylon that do not absorb water easily. Some fleece may have a DWR (durable water repellent) finish applied to the fabric, which helps to repel light moisture. For full waterproof protection, a waterproof membrane or coating would need to be added to the fabric.
To effectively make cloth diapers waterproof, you can use a waterproof diaper cover or apply a waterproofing treatment to the fabric. Waterproof covers can be made from materials like PUL (polyurethane laminate) or wool. Waterproofing treatments like lanolin or silicone-based sprays can also be applied to the fabric to repel moisture.
Some fabrics are waterproof while others are not. Some waterproof fabrics are:Latex or natural rubberGore-TexVinylFluoropolymers
They may have one or two special styles that are. However most of them, while probably made of waterproof or water-resistant fabric, are not waterproof as a whole. To make something 100% waterproof, all the seams must be sealed and special waterproof zippers must be used.
Well plastic keeps your fabric waterproof if thats what you mean?
To effectively waterproof fabric using wax, you can melt the wax and apply it evenly to the fabric using a brush or cloth. Make sure to cover the entire surface of the fabric with a thin layer of wax. Then, use a hairdryer or heat gun to melt the wax into the fabric, creating a waterproof barrier. Allow the fabric to cool and dry completely before using it.