Waterproof Drybag Backpack. 

• Protects against rain, snow, ice and submersion.
• Expandable DRY WEB allows for both dry and wet transport.
• AIR FLOW padded back support.
• Low Profile Lumbar pad.
• Adjustable sternum strap.
• Low profile, adjustable shoulder straps.
• 2 Sturdy mesh side water bottle pockets.
• Rear facing reflective indicator.