> For the complete documentation index, see [llms.txt](https://docs.earn.polynomial.fi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.earn.polynomial.fi/technical-implementation/synthetic-assets.md).

# Synthetic Assets

Please note that the vaults only accept deposits with Synthetic Assets. Synths are created by [Synthetix Protocol](https://synthetix.io/synths). Synths are derivative tokens providing exposure to a range of assets. They can be traded with infinite liquidity and zero slippage by leveraging the Synthetix protocol’s unique pooled collateral model.

* [sUSD](https://optimistic.etherscan.io/address/0x8c6f28f2F1A3C87F0f938b96d27520d9751ec8d9#code) (for the put-selling vaults)
* [sETH](https://optimistic.etherscan.io/address/0xe405de8f52ba7559f9df3c368500b6e6ae6cee49#code) (for the call selling ETH vault)

To swap your existing token into Synthetic assets. Please use [1inch](https://app.1inch.io/#/1/swap/USDC/sUSD)