Designing and application of vests in Russia differ from American. There is a number of requirements to reduce the damage from the shot, so lining set is applied in Russian vests especially for this.   

Body Armor Lining Set by Techincom perfectly fits 6B45 and 6B46 types vests, but could be used for most of vests with velcro inside.   

There're 2 items in the set.