Ключевые слова: activities, adventure, camping, clean, clear, convenience, device, engineering, environment, equipment, essential, exploration, filtration, flow, forest, gear, green, health, hiking, hydration, lightweight, natural, nature, outdoor, plants, portable, purification, quality, refreshment, resource, river, riverbank, rugged, safety, stability, stream, streamside, survival, sustainable, system, technology, tool, tools, travel, water, wilderness,