Apple has spent a significant amount of its iPhone 15 event today talking about its environmental bonafides, and part of that is the fact that it will no longer sell leather accessories, including things like iPhone cases and Apple Watch bands. The company noted that while leather is popular for things like watch straps, it has a serious impact on the environment, particularly at Apple's scale.
Instead, Apple is introducing a new product called FineWoven that'll replace its leather straps. Visually, they do look quite similar to the leather bands it used to sell — the leather loop and "modern buckle" styles will still be available, just in this new FineWoven material. Apple also confirmed that it is using FineWoven on this year's iPhone cases, as well.