Our outsole is made with a blend of new and recycled synthetic rubbers. We do not use latex as a component in any of our products, and have many happy customers wearing our shoes that have expressed the desire for a latex free product.This said, allergies are a tricky thing to trace back to one product component and while we have not received any feedback of it happening with our shoes, reactions can still happen. Some folks have reported related allergies to other rubber products like Neoprene (used in our Chloe and Thandi shoes), which do not contain latex. Unrelated to our shoes, but we have heard of some people being so sensitive that even latex-free products produced in the same factories as latex products can cause a reaction.You will also find latex free rubber products in our removable insoles; the recycled cork EVA heal cup (Ethylene Vinyl Acetate) and the Eco-Ortholite polyurethane with 20% natural bio based oil (non-latex) source are both expanded foam rubber products. We even use water-based glues in our shoes and insoles so no latex there either.We understand the need to investigate and recommendation that you follow any medical advice that has been provided when trying new products. Please feel free to test our shoes by wearing them indoors on carpet, as we are happy to take them back if they are in new condition should you find that they indicate to cause a reaction.