The Triumph is back, and better than ever. Featuring an EVERUN Landing Zone, TRI-FLEX outsole and ISOFIT upper, the Triumph ISO 2 ups the ante for runners seeking supreme cushioning in a smooth, flowing ride.
*83% energy return: Energy Return is measured as the ratio of energy returned by the 45 mm disk shaped sample, divided by the energy absorbed by the sample. Energy return is measured using a modified ASTM F1614-99(2006) Procedure C with an electromagnetically driven impact test device. Samples are approximately 20mm thick. The foam sample is impact tested 1000 times to obtain a repeatable measure of mechanical characteristics.
*3x more durable: Comparison is to standard EVA (SSL EVA 52 Asker C durometer) measured using a modified ASTM F1614-99(2006) Procedure C with an electromagnetically driven impact test device. Samples are approximately 20mm thick. Durability is determined by comparing the sample thickness and energy absorbed characteristics before and after 100,000 cycles of dynamic loading.