The Protective Insert (PI-MS) was designed for the Eagle One Quart Canteen Pouch (CTP-1L-MS) to allow you to expand your carry options without having to redo your kit. It is specifically sized to carry the PVS-14, but will accomodate similar size items. Padded with closed cell foam. Attaches firmly to the interior of the Eagle One Quart Canteen pouch with a 2" x 4" Velcro pad. Made in the USA Lifetime Guarantee