(TrendHunter.com) Aftermarket shoe inserts and insoles are great for providing additional comfort but are often made with materials that need to be thrown away after use, which is something the PRIMAL Soles 100%... (TrendHunter.com) Aftermarket shoe inserts and insoles are great for providing additional comfort but are often made with materials that need to be thrown away after use, which is something the PRIMAL Soles 100%...