The only equipment proven to protect the brain. Official Partner of the Premier Lacrosse League Safe and EffectiveAids in the protection of the brain from effects of repetitive sub-concussive head impacts. An Added Layer of ProtectionHelmets protect the head from the outside. The Q-Collar helps protect the brain from the inside. Made in the USAProudly manufactured in Sussex, Wisconsin. Light & FunctionalThe Q-Collar can and should be worn with other existing protective equipment. The Q-Collar is a non-invasive device intended to be worn around the neck of athletes aged 13 years and older during sports activities to aid in the protection of the brain from effects associated with repetitive sub-concussive head impacts. Sizing Accurate measurement is important to selecting the right size Q-Collar for you. Start by using a soft measuring tape to measure the middle of the neck. Make sure it is snug with zero slack between the tape and neck. Measure three times and use the smallest measurement. If you do not have access to a soft measuring tape, consider using a shoelace or string, then holding it against a ruler. We do not recommend using a shirt size for this measurement. Neck MeasurementInches Q-Collar Size 10 3/4 - 11 3/4 11 12 - 12 3/4 12 13 - 13 3/4 13 14 - 14 3/4 14 15 - 15 3/4 15 16 - 16 3/4 16 17 - 17 3/4 17 18 - 18 3/4 18