The Neck Exerciser works great to help you train your neck and build up neck muscles. Features: 1. Enhance the neck muscles and overall stability for football players, boxers, wrestlers, etc. 2. Adjustable Neck Harness for comfortable wearing experiences. 3. High-quality scuba fabrics and nylon materials to snugly fit your head, forehead, and chin. 4. D-rings on the sides of your ears and above your forehead to help you with complex exercises like weighted lying neck extensions. Specifications: Product Name: Neck Exerciser Strengthener Size: Free size Colour: Black Material: Scuba material, nylon User Group: Adults Packing Size: about 24*17*1cm / 9.45*6.69*0.39inch Weight: about 100g Packing List: 1* Neck Weight Lifting Harness Notes: 1. Due to the lighting effects and shooting angles, there is a color difference in the product, please understand.2. Due to manual measurement, there is a tolerance in the product size.