There is hook velcro sewn on the back of the shotgun cards. Made for 12gauge shotgun shells only.
Sizing: 4.5" long x 2"wide
Black,CoyoteBrown,RangerGreen,Foliage color is mil spec Elastic.
Muliticam color is printed mil spec Elastic.
ODGreen,WolfGrey color is commerical Elastic.