This waist pack has an ultra - thin design, effectively storing all items. Ideal for outdoor activities, its belt adjusts from 18 to 50 inches. The 600 - ml max water bottle pocket (bottle not included) fits bottled water. Made of soft, breathable, waterproof, lightweight elastic nylon, it fits comfortably. Reflective strips ensure safety in the dark. Waterproof, it protects phones from rain and sweat. High - quality materials make it durable and tear - resistant.