Feature: 1. Effectively relieve the soreness and discomfort caused by neck compression and poor blood circulation. 2. With open throat design, suitable for neck support after tracheal incision, intimate and comfortable. 3. The front neck collar and the back neck collar are separated, which can better adjust the width to adapt to the tightness of the neck. 4. Multiple hole hollow design is highly breathable and durable. It is not easy to deform and is comfortable to wear. 5. Breathable and lightweight design provides you with the best cervical spine care. Specification: Item Type: Neck Cervical TractorSuitable People: Adults Size Front Height Back Height S 14cm / 5.5in 19.5cm / 7.7in M 15.5cm / 6.1in 20.5cm / 8.1in L 16cm / 6.3in 21.5cm / 8.5in . Package List: 1 x Front Neck Support1 x Back Neck Support Note: 1.The width of the product can be compressed and adjusted. The adjustment of the two parts can be adjusted according to your own situation.2. Please allow slight error due to manual measurement. Thanks for your understanding.3.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.