We are sorry to hear that your experience with your Vessis have not been a good one. While there are many that find Vessis comfortable, we understand that it might not be for everyone.
Our Everyday Vessis do have a chunkier midsole than our other designs to help provide better lateral support. Our Cityscapes and new Weekend Vessis both have a slimmer silhouette, which might be more to your liking.
But we understand that the style of shoe isn't the full issue here, it's the comfort. Being a lifestyle / casual to lightly active shoe, Vessis have relatively low arch support, but we made the insoles removable to allow the most customizable fit for those wanting to wear them for longer distances or for those that need extra support! So you can add your own custom orthotics or special insoles!
As for breathability, do you wear socks with your Vessis? They are meant to help wick away any moisture and should help control temperature. It is odd that your Vessis have been so hot like a sauna, however, this definitely shouldn't be happening.
We see one of our agents have already reached out to see if there is something we can do for you. If you have any further questions or feedback, please do not hesitate to reach out to us at email@example.com.
The Vessi Team