SolWear is a low-cost wearable Solana signing device built into a smartwatch form factor. It runs SolWearOS, our custom embedded OS on ESP32-S3, and protects wallet material with a layered key-security architecture: password-derived keys, device-bound encryption, hidden encrypted storage, and RAM-only signing. NFC + the mobile companion app make self-custodial Solana payments feel like tapping your wrist.