A wrapped token is a representation of another asset, created to make that asset usable through a different token interface or on another network. Wrapping can happen on the same blockchain; it does not necessarily involve a bridge.
How a wrapper works
A common design locks an underlying asset and issues a corresponding token. Unwrapping removes the representation and releases the underlying asset according to the wrapper's rules. Some systems rely on smart contracts, while others also depend on custodians or cross-chain verification.
Conversion ratios vary
Canonical WETH on Ethereum represents ETH at one WETH per ETH, excluding transaction gas costs. It gives ETH an ERC-20 interface. Other wrappers use shares: wstETH represents a changing amount of stETH as the underlying accounting changes. The term wrapped therefore does not imply a universal one-to-one conversion ratio.
The route back matters
Market trading prices can diverge from the amount obtainable through redemption. Contract faults, custody failures, bridge problems or redemption restrictions can weaken that connection. Verify the exact network and contract, what backs the token, who can redeem it and where unwrapping occurs. Wrapping alone does not create investment income or remove the underlying asset's risks.