Garmin Backpack Tether (010-11855-00)

Hope it’s as handy as I expect it to be.

Works fine for me. Simple and straightforward. But: Relies on two horizontal Velcro straps around the backpack strap. The problem with this is that if your backpack's straps get more slim as they go down, this attachment will slide down as there'll be nothing to stop it. Solution would be to pin a badge or something similar through the strap to hold it up, or place it above some external feature on the back strap like an elastic or similar.

Bought the same item in 2014 and have been using it ever since. Got to the point where velcro wasn't working well when walking on rough terrain. Had to keep pushing both halves together. Not bad for 5 years solid use.

Bought for GPSMAP 66 - great accessory

Weighs only 31 grams yet allows for easy access to your device (Garmin InReach). It attaches to the shoulder strap of your backpack and has a standard Garmin belt clip mount so my cub/scouts can also use it with their eTrex. Postage from Johnny Appleseed was very fast. This is simple, cheap and somewhat flexible insurance for your gear.