Is the so-called “cowhide tendon” nylon or polyurethane?

Found online: In the past, they were generally made of rubber, but these days many are made of TPR; for example, Nike uses TPU! The earliest rubber-soled shoes were indeed made of rubber, but as technology improved, PVC was able to be used to create soles that were almost as good as those made of rubber. So there should be two materials now, one is rubber and the other is PVC. Cowhide rubber – as the name suggests, it possesses toughness, elasticity, excellent wear resistance, and transparency, just like cowhide. What sets it apart from other rubber soles is that cowhide rubber soles contain a higher amount of rubber, which gives them great wear resistance; moreover, a transparent formula must be used to ensure that the product has high transparency ； Traditional rubber cord soles are produced using flat vulcanization machines, resulting in high manufacturing costs. Now, thanks to the emergence of new materials, new types of elastomers have replaced some rubber-based soles; these are TPR and ABS. Their advantage is low cost, as new injection molding technologies allow for higher production volumes and lower manufacturing costs, while their appearance is similar to that of traditional rubber soles.

It doesn’t seem to be any of those, haha. But it does have a polyurethane sole, which is very durable

Rubber soles are made of rubber; they are neither nylon nor polyurethane, but are mostly made of natural rubber or styrene-butadiene rubber. Rubber soles offer good elasticity and wear resistance, as well as a relatively high level of transparency. The polyurethane soles mentioned by the original poster are also quite popular these days; they’re not made of rubber, but rather those black, extremely lightweight soles. The difference is quite large.

The so-called cowhide sole is made from high-quality natural rubber; it features a high wear resistance, good flexibility, high quality transparency, and comfortable wear； But later, as people’s technology improved, PVC could be made to be almost as good as rubber. So there should be two materials now, one is rubber and the other is PVC. Other sole materials include rubber (RU), thermoplastic rubber (TR), polyurethane (PU), or thermoplastic polyurethane (TPU).

The so-called cowhide sole is made from high-quality natural rubber; it features a high wear resistance, good flexibility, high quality transparency, and comfortable wear； But later, as people’s technology improved, PVC could be made to be almost as good as rubber. So there should be two materials now, one is rubber and the other is PVC. Other sole materials include rubber (RU), thermoplastic rubber (TR), polyurethane (PU), or thermoplastic polyurethane (TPU). ………………………………………………………………………………………………………………………………………………………… It seems there are still those with EVA soles available now

Hehe, I’ve learned something new – there’s knowledge everywhere. Those with cowhide soles are better; polyurethane ones are lighter

A cowhide sole refers to high-quality rubber; it used to be styrene-butadiene rubber, etc., but now polyurethane rubber is the best. The bag is an Oxford bag, right? It seems to be a bag made from fabric crafted from synthetic fibers such as polypropylene and acrylic

Polyurethanes are generally rarely made translucent. . Moreover, polyurethane is much lighter than “cowhide”. .

I missed some information found online; I hope this will be helpful to the original poster. Cowhide rubber – as the name suggests – has the toughness and elasticity of cowhide, excellent wear resistance, and is also transparent. What sets it apart from other rubber soles is that cowhide rubber soles contain a higher amount of glue, which gives them great wear resistance. Additionally, a transparent formula must be used to ensure that the product remains highly transparent； Traditional rubber cord soles are produced using flat vulcanization machines, resulting in high manufacturing costs. The soles of indoor shoes are mainly made from two types of materials: raw rubber (commonly known as gutta-percha) and vulcanized rubber (commonly known as rubber). For wooden floors, it is better to use soles made of raw rubber, as they offer better anti-slip properties compared to those made of vulcanized rubber. The downside is that they are not as wear-resistant; the soles will wear out quickly if the shoes are worn regularly. Vulcanized rubber has a wider range of applications (due to the different ingredients added to it), is more wear-resistant, and performs very well on plastic surfaces used for badminton. However, according to current trends, high-quality indoor sports shoes use raw rubber as the main material, with vulcanized rubber used as a supplementary material.

But SBS is not wear-resistant, so it needs to be modified.

It’s not nylon or polyurethane; polyurethane is better.

I’m not sure what it exactly is, so I don’t dare to give a rating rashly. If anyone has a definite answer, please let me know. Thank you.

It should be PU; the soles used to be made of natural rubber, but now synthetic rubber is used in most cases.

Baidu explains it as follows: Cowhide rubber is essentially thermoplastic elastomer. They are generally available in black and yellow. It has a transparent and soft appearance, and is non-slip and wear-resistant. The way to check it is to pinch a corner of the sole and pull it outward; if it can be pulled 1–2 millimeters, it has excellent elasticity. From online searches, it seems that \"cow tendon\" is a general term for materials with wear resistance, anti-slip properties, and high elasticity. rather than being limited to that one material.