The Nathan waistpack has changed over time. From top to bottom
2013 - small pocket, ykk zippers, plastic clips
2015 - slightly wider but not as tall pocket, ykk zippers, silver reflectors
2025 - narrower pocket but much taller, generic zippers, smoother, silver reflectors, tighter webbing with less airflow, plastic clip positions are reversed (not shown), thicker, and not compatible with older units
