PUMA Women's Complete Ventis 2 Running Shoe 100% Synthetic Synthetic sole For those with a neutral trainer, this shoe combines excellent cushioning with a stable geometry for all runners duoCELL technology combines durable cushioning and maximum stability ld-CELL is an EVA based, cushioning, low density material for improved shock absorption ArchTec arch support increases the functional firmness and saves weight while still allowing the necessary torsional freedom and natural twist of fore and rear foot OrthoLite sockliner for maximum fit and comfort, fast material regeneration, optimized air circulation, and is made of a highly breathable antimicrobial material