The ultimate in versatility the redesigned platypus tokul xc 80 hydration pack boasts a combination of capacity intuitive storage a low profile silhouette and the new airy ridgeairtrade back panel for quick comfortable riding over miles and miles of trail platypus tokul xc 80 hydration pack features ridgeairtrade back panel ridged foam with ventilation channels and lightweight breathable mesh ensure cooling airflow and carrying comfort 30l big ziptrade