【For Outdoor Activities】Keeps shoulder straps of your backpack securely in place and free your hands 【Abundant Zipper Pulls】10 pieces black zipper tags are enough for your spare or replacement; Good quality and lightweight accessories which is handy and easy to use 【Quick Release Buckle】Each strap with a quick release buckle and easy to buckle and unbuckle 【Universal Design】Adjustable length from 4" - 22", compatible with most sizes 【Extra Function】You can carry small accessories when you go out, D rings for attaching some light stuff