The Endorphin Pro 4 running shoe is a miraculous feat of engineering: snappy and responsive yet smooth and efficient. Something we achieved by fusing PWRRUN PB and PWRRUN HG together in the midsole – an industry first. A full carbon plate adds longitudinal stiffness and maximum metabolic efficiency. And the silky-smooth heel liner and integrated tongue system makes this marathon shoe feel like slipping on an old friend come race day.
Sizing
Length: True to size, though runners coming from the Pro 1 to 3 may prefer a half size up
Width and toebox: Normal width with more volume than the Pro 1 to 3, accommodating but still narrowing near the little toe, so genuinely wide feet should be cautious. Standard width only.
Fit notes: The heel counter is thin and flexible with little padding, so most runners need to lace firmly, sometimes using the top eyelet, after which there is no heel slippage. The gusseted tongue tends to fold on itself when cinched. No real break-in.