Oxford M1R Micro Tank Bag

You could call Oxford's M1R Micro Tank Bag a survival sliver. This tiny wedge has pocket to house a smartphone for navigation purposes and a small compartment for keys, wallet and maybe a pair of ear plugs -as long as your key ring isn't janitor-spec and your wallet isn't George Costanza-spec. This is about as small as tank bags come. 

Features:

• 1L capacity
• 420D Ripstop nylon construction
• Includes recommended headstock safety strap 
• Water resistant zippers
• Touchscreen friendly pocket with anti-glare shield for GPS devices and smart phones 10cm W x 17.5cm H (3.9" W x 6.9" H)
• Electrical pass through
• Lifetime guarantee against faulty materials or manufacture
• 24cm L x 18cm W x 14cm H (9.4" L x 7.1" W x 5.5" H)