1. Easy to put on and off with high-sticky Velcro. This Arm Sling Shoulder Immobilizer provides quick, adjustable tightness for secure fixation of injuries such as shoulder, rotator cuff, scapula, humerus injuries, nerve palsy, and arm hemiplegia. It is especially suitable for sleeping, and also usable at home, during travel, or at work. 2. Ergonomic design. The upper back cross design balances the shoulders, prevents straps from slipping, and reduces shoulder pressure and neck strain. A widened chest strap stabilizes the shoulders and keeps the arm securely against the body. 3. Sponge strap for comfort. The strap is sponge-filled, light and comfortable, and designed not to choke the neck or cut off circulation, even with long wear. The cross-back design helps prevent slipping and further reduces neck strain and shoulder pressure. 4. Exquisite workmanship. This Arm Sling features a fashionable, neat cut that is fresh, simple, and odor-free. It comes in different sizes and fits left or right hands, suitable for men and women, teens, adults, and older adults. 5. Use scenarios. - Post-injury or post-surgery immobilization, especially for sleeping or resting. - Daily use at home, during travel, or at work to keep the arm protected during activities. - Support for conditions such as nerve palsy or arm hemiplegia to maintain secure immobilization during recovery.