Why Use Gtechniq I1 Smart Fabric? I1 Smart Fabric protects all kinds of fabrics from water-based stains. It is breathable and extremely durable, thanks to Gtechniq’s unique scientific formula. I1 makes ordinary fabrics waterproof and easy to clean. Use it to prevent soaking, swelling or rotting on any fabric. Ideal for use on your cars convertible roof or interior. Smart Fabric is colour safe. Nano particles that make up I1 Smart Fabric coat each fabric fibre individually, leaving the texture unaffected, allowing the material to breathe. This means stale air will still be able to escape, while repelling water and and oil-based liquids. Quick Overview Lasts up to 12 months No change to fabric feel Flurocarbon free Bottle Size: 500ml