Spenco Propel Performance Insole triathlon double-layer sock designed to keep

double-layer sock designed to keep young feet cool

Speed 2: 2400 rpm

Raised tips stimulate blood and oxygen flow

Designed with light padding

Spenco Propel Performance Insole triathlon double-layer sock designed to keepSupercharge the cushion in your everyday trainer with Spenco Propel insoles featuring INergy Foam technology. Experience a lighter, more durable insole that provides superior energy return versus the standard insole. Features 12X Greater Energy Return giving you a feeling of extra bounce in each step 2X More Durable for mile after mile cushioning in any shoe 20% Lighter for a lightweight supportive feel while gliding down the road Contoured and