Written by: Cherri Choate, DPM
12/9/2009

With all the functional prefabs out on the market, here is a quick primer on Prolab's choices.  Firstly, all the devices are made of a semi-rigid polypropylene shell with 2 mm medial skive, 14 mm heel cup and 3 degrees valgus correction. 
Below are the differences:
 

• P3 Low-Impact: Full length 1/8" plastazote and 1/6" poron topcover; 4/4 polypropylene RF post
• P3 Sport:  Full length synthetic suede topcover padded with high-rebound EVA; 4/4 polypropylene RF post
• P3 Posted: no topcover; 4/4 polypropylene RF post 
• P3 Posted TC:  Full length tri-color EVA topcover; 4/4 polypropylene RF post
• P3 Unposted:  no topcover; 0/0 spot grind (no postt)
• P3 Unposted TC:  Full length tri-color EVA topcover; 0/0 spot grind (no post)
   

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