200" built in spacer to provide perfect 0

Active Joining: Instant response

Closed cell mesh crotch gusset

an UltraRange UltraCush™ EVA midsole with toe and heel protection

Superfeet Carbon B Insole W4.5-6 ho21 200" built in spacer toBreakthrough design combines the strength of carbon fiber with ultralight foam to create the most innovative_ high performance Superfeet insole ever. SIZE: (2. 5 4) (4. 5W 6W) HOW IT WORKS Superfeet insoles help adapt the flat midsole of the footwear to your foot. The distinct Superfeet shape helps to stabilize the foot_ while the structured heel cup and full length foam provide support and comfort for every step. Heel Cup: The structured heel cup