Calf Crush bjj hat It's because blue is the

It's because blue is the color you turn when you get choked unconscious

Reinforced in the collar

Secure & Comfortable Fit: A durable elastic waistband paired with an adjustable drawstring locks in a snug

or honing your craft

breathable fabric keeps you cool under pressure

Calf Crush bjj hat It's because blue is theA calf crush or calf slicer (also known as calf cutter, knee slicer, or knee separator), is a technique wherein one compresses their opponent's leg (heel to butt) while placing one's forearm or shin behind the knee to crush the calf muscle while potentially separating the knee joint. Calf locks can cause very serious injuries to the knee as well as damaging the calf muscle. * We recommend you wash your shirts inside out to help prevent premature