What material are the Madpax “spike” packs made of?

Spike is currently offered in leather like fabric made of Poly-Urethane. This material delivers durable and vibrant colours that are easily cleaned. While durable, this material has a top coating for colour; if dragged or abused the colour may wear or scratch. This is considered normal wear and tear and not be covered under our warranty. The interiors are lined with polyester/nylon. All zippers are smooth functioning nylon.