Down jacket in opaque and stretch fabric
The bi-stretch or bi-elastic fabric is a fabric that can be stretched both in length and in width. Also known as “four way stretch”, this type of yarn makes the outerwear very comfortable for every movement.
Downproof indicates a fabric created to prevent feathers from escaping.
A fabric is water repellent after special treatments to make it resist water: the drops of water do not remain on the fabric, but slip away. Water-repellent fabrics have a certain degree of porosity so they are permeable to air and water vapor. They allow the passage of water when the hydrostatic pressure is high (for example during heavy rain).