Nice and snug

your Lacrosse helmet should sit squarely but feel nice and snug yet very firm. The skin on your forehead should go with it if the helmet is moved upwards, downwards or from side to side. The chin strap needs to be sufficiently tight to hold your helmet on, but not too tight to cause a headache! They also have a knob at the back of the helmet which can be turned to tighten or loosen the helmet what a good idea!