Instructions： * A removable sleeve is equipped, it can be covered on the product, comfortable and hygienic. * Measure your neck circumference and neck height, and choose the size according to the chart. * Please note that the concave position of the product must be aligned with the chin when wearing. * Adjust the tightness with the Velcro to ensure the best support and comfort. Product Name：Neck Brace Version：Comfort Version、Enhanced Version、Dual-use Version Material：Polyester cloth, Sponge, Sweat cloth, Velcro, etc.Colour： Blue (Comfort/ Enhanced)、White(Enhanced)、Brown(Dual-use) Regular Size: Small 2.75"：Neck height 2.75"/Neck circumference 10 1/2"-11 1/2" / 27-29cm Medium 3"：Neck height 3"/Neck circumference 11 1/2"-14"/ 29-35cm Large 3.3"：Neck height 3"/Neck circumference 14"-16 1/2"/ 35-42cm X-Large 4"：Neck height 3.5"/Neck circumference 16 1/2"-18 3/4"/ 42-48cm Special Size: （only available in the Comfort Version）Small 3.5"：Neck height 3.5"/Neck circumference 10 1/2"-11 1/2" / 27-29cm Medium 4"：Neck height 4"/Neck circumference 11 1/2"-14"/ 29-35cm Large 4"：Neck height 4"/Neck circumference 14"-16 1/2"/ 35-42cm X-Large 2.75"：Neck height 3.5"/Neck circumference 16 1/2"-18 3/4"/ 42-48cm Washing:* Please securely fix the Velcro before washing, so as to prevent the Velcro strap from damaging or gluing other clothes.* Use neutral detergent to wash it in water at 30°C. Rinse it thoroughly with clean water after washing. Do not use fabric softeners. Do not bleach, machine wash or dry clean. * Do not wring dry after washing, but you can squeeze it by hand or use a dry towel to in excess water, then place it at a dry place. Do not iron, dry or expose directly in the sun.