> For the complete documentation index, see [llms.txt](https://whitepaper.readon.me/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://whitepaper.readon.me/read-fi-token-economy/read-fi-mechanism/durability-and-recovery.md).

# Durability and Recovery

Each Catto NFT begins with full durability (100/100) but when it is equipped and used to generate rewards, its durability will deteriorate. If the durability reaches 0, the Catto NFT will enter "repair" mode, where it will not generate any $READ or EXP. 

Only the equipped pair of Catto will be affected by deterioration. Users can repair their Catto and recover their durability at the cost of $READ, which will vary depending on the Catto NFT level and tier.

**Recovery Cost Per Durability Point**

* Tier 1: 0.04 + 0.009 \* level 
* Tier 2: 0.04 + 0.012 \* level
* Tier 3: 0.04 + 0.016 \* level

For Tier-2 and Tier-3 NFTs, certain ReadON community services will be also required to repair these NFTs.


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