Here’s what consumers have asked with answers from Gravity Defyer staff and previous consumers.
Hello Bruce, We do have a style werecommend for running, that style is called the ION. I will post a link to the product below. Please give time to break the shoes in and train in them as well. http://gravitydefyer.com/search?query=ion
Hello Richard! So sorry for the late response, we have just unlocked our site jabber account to communicate with customers like you. Springs have been an issue with some of our designs in the past, this is why we have removed metal springs from our new designs and replaced them with synthetic springs. The technology has not change, just the material and it is working better than ever! You can find these new styles here> http://gravitydefyer.com/search?query=omega
Hello Joseph, So sorry for the late response, we have just unlocked our site jabber account to communicate with customers like you. Has this issue been resolved? If not, please contact customercare@gdefy.com and let them know you spoke with Sarah O. On Jabber and they will take care of you. Please feel free to contact us on facebook or via email for a faster response.