Tyvek® redefines the classic drawstring backpack in the Paperwallet Rope Pack. Thin, light, and durable. The Tyvek® becomes a perfect canvas for high-res artwork and will hold all of your needs comfortably and reliably. Tyvek® is super thin and extremely durable and the material itself is water-proof! Built for the craziness and versatility of your day-to-day life.