waterproof backpack for caving high quality and durable enough,specially designed for caving,convenient to carry,low price. waterproof backpack for caving1, waterproof bag easily to fold and open, convenient to carry2, carry clothes, books, or others to camp site3, specially designed for caving 4, durable waterproof and lightweight5, high quality, 100% waterproof6, good idea for promotional with ...