【Tyvke KNAPSACK (BLUE BIRD)】 This knapsack is made of Tyvek® material. Tyvek® is a high-density polyethylene fiber nonwoven fabric developed by DuPont in the United States. It is a fabric with excellent breathability and waterproof performance, as well as outstanding strength and durability. It can be used for various purposes, such as carrying a change of clothes for hiking or camping, carrying valuables when depositing luggage, organizing groceries, carrying a bathing set for hot springs or baths after a mountain trip, or as an everyday eco-bag or sub-bag. Size: (H)50cm x (W)37cm Material (Body): Tyvek® Material (String): Acrylic Weight: Approximately 48g The knapsack features a design with the "blue bird," a symbol of happiness, as its motif. The blue bird of happiness embodies the meaning that "happiness is close at hand, and there is happiness that we don't notice because it's too close." ⬛︎Note: Washing Tyvek in a washing machine is generally not possible. If it gets dirty, wipe it with a tightly wrung cloth and dry it in the shade in a well-ventilated place. ※Items other than the knapsack in the product image are not included.