Antislip stability: Rubber bottom keeps the board from sliding on any surface. A raised heel design locks the heel in place and provides a gentle massaging feel during use. Ergonomic footrest: Elevates feet and legs to help improve posture while you work or relax, reducing fatigue during long days at the desk or on the couch. Strong construction: Built with PP and TPE for a sturdy, wobble triangular frame that resists deformation for lasting reliability. 15 fixed angles: 15 incline settings for calf/ankle stretch, promoting proper technique and reducing the chance of overextension. Portable and compact: Lightweight and easy to move between desk, living room, and gym, with simple storage when not in use. Practical use scenarios: Desk workers: place under the desk to improve posture during extended screen time. Postworkout or daily mobility: use for gentle calf and ankle stretching as part of a routine. Rehab and recovery: adjust angle gradually to support safe, incremental mobility work.