Hedge is a company that offers 0% interest liquidity on the Solana network. They provide decentralized, secure, and instant access to the value of SOL without losing future upside. Hedge allows users to create vaults, deposit collateral, take margin, and access flexible liquidity. They also offer USH, a stablecoin pegged to $1, which is fully backed and redeemable at any time. Hedge's collateral is kept secure in vaults, and they ensure efficient liquidations through a stability pool.