Very well constructed and my 24 oz Camel Back bottle fits nice and snug. You can attach this with a hanger and D-Clip (D-Clip not supplied) to your belt, belt loop, or backpack. You can also use the straps on the back to run your belt through or use the straps to attach to a backpack. The straps snap securely for convenience. This is a very convenient water bottle holster. However, a 24 oz Camel Back bottle is the largest you can put in it. It does not have a shoulder strap but I wasn't looking for that.