Features: Simple device that attaches to any door for neck pain relief in just ten minutes or less. A simple way to relief your neck pain everyday everywhere. Lightweight and portable that are easy to carry with. Helps release muscle tension in as little as 10 minutes a day and for less than the cost of a single physical therapy session. Hand washable. One size fit all. Don't need to worry about the size problem. How to use this Hammock ? 1.It requires only a door or rail to function properly. Simply wrap the fabric hook around the back handle, that which is hidden from view, of a closed door, so that the leash passes between the door and the doorjamb. 2.If using a rail or pole, wrap the fabric around something parallel to the floor. 3.Then lay on the ground, keeping the body straight and the back against the floor with the head and neck cradled by the hammock. Benefits can be felt with just 10 minutes of use per day. Specifications: Material: Velvet, environmentally friendly breathable sponge, breathable mesh Package including: 1* Neck Stretcher Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow slight deviation for the measurement data. High quality store for you!