Zero. Okay, technically there is a little bit of cushioning provided. However, Feiyues are going to do very little in regards to absorbing shock. It’s not what they were designed for. If your parkour training includes lots of drops and heavy impacts your technique will need to be spot on to avoid injury. Because Feiyues won’t cover up any mistakes in technique, they can be very useful for practicing landings, even if don’t use them as your primary parkour shoe. This is largely what I’ve used them for in the past.
If you are just transitioning to a shoe with this minimal level of padding, please take it very slow at first. If you want a pair of shoes that will give you a little more protection but are still minimalist leaning, check out Asics’ Onitsuka Tiger Ultimate 81s.
Given the simplicity and minimalist nature of Feiyues, you would be correct in assuming that they are very light. However, they definitely aren’t the absolute lightest out there you could find. This is because of the slab of rubber they use for the sole. The balance of the shoe is actually a little more exaggerated than normal running shoes as there is really no weight above the sole of the shoe.
Overall, the grip on Feiyues is pretty good to great, but don’t expect something like Five Ten rubber. They grip well on most surfaces, although they struggle a lot in wet conditions. If you have good technique the grip will be more than enough though. The real issue with the sole is the durability.
The grip wears down quickly with any sort of heavy training, especially cat leaps and wall runs. The rest of the shoe is pretty durable and includes metal eyelets. Nothing is likely to cause you any real problems before the grip is completely destroyed, which isn’t necessarily saying very much. In isolation, I would rate the durability as poor, but for the price you can’t really expect very much. Considering you could buy several pairs of Feiyues for the same price as most other parkour shoes, the durability issue disappears.