The Paradigm 5 is a plush cushion hybrid stability shoe that uses Altra’s proprietary Guidrail technology to supply support and stability where you need it. (Interestingly, other shoe companies are now exploring their own versions of the guide rail philosophy.) The main update to the Paradigm is a change in upper materials. Gone is the knit upper, that many runners found to be a bit too flexible. Now, the Paradigm sports a supportive mesh. As with all Altra shoes, the Paradigm 5 is zero drop and has a FOOTSHAPE toe box so that your toes will be more comfortable. If you need cushion and support, be sure to try out the Altra Paradigm 5.