It’s a wonder of modern science that PU soles (polyurethane) are very light and hard-wearing. The downside of PU is that it disintegrates over time and when left unworn for long periods, starts to break down. A PU sole can last up to 5 years before this ageing process begins.
TR (thermoplastic rubber) is more durable and thus preferable to PU but becomes quite bulky/heavy when used on a thicker sole like a wedge for example.
Shoe manufacturers have no option but to use polyurethane (PU) due to the availability of suitable sole material. Hopefully, with the advance in technology, a better compound will be developed.
Rest assured, Froggie follows strict guidelines during the manufacturing process and our shoes adhere to the highest quality standards.
Thank you for your continued support. Please contact firstname.lastname@example.org should you have any further queries.