4" x 3.5" Cordura bag with 17oz of weight, sewn closed with Velcro backing for attaching to helmet. Stainless steel BB's (to avoid corrosion) encased in a Cordura bag with Velcro for helmet mounting with a total of 17 OZ. (center of the weight range, adjusted for more or less by vertical positioning on the helmet) A must for the professional, Avoid loose pennies and poorly manufactured bags that may open in a crash sequence!  ACU material or Black. 

Without weights is....4" x 3.5" Cordura bag with Velcro backing for attaching to helmet. Velcro closure.  ACU material or Black.