The Plexus 2.0 is a 4 liter low profile waist pack designedto carry a variety of contents securely. The back portionof the Plexus 2.0 features a horizontal bottle pocketthat includes an UltraFlask 550 Hybrid Bottle. Thecompartment is fully insulated and can be accessed withthe left or right hand. Foam has been added to ensure younever feel the contents of the pocket on the lower back.4-way stretch mesh prevents the bottle from inadvertentlylaunching. Dual forward pull adjustments make gettingthe perfect fit a breeze and the breathable webbingallows sweat to escape for zero chafing. The front portionof the Plexus 2.0 has seen a capacity increase whichkeeps the load balanced and the profile low across theentirety of the pack. For webbing management, the frontfloating pocket has room to tuck any excess away. Theconical shape which appears on all UltrAspire waistpack products has been refined through 30 years ofdevelopment to ensure a comfortable and non-slip fit.One size fits most