The 109 Lt is designed for  longer back bergens and large sized patrol packs

Nothing worse than when its hammer down with rain, sleet & snow and go to get something out of your Bergen and find its soaked – Bad admin or poor quality cheaper brands

Ortlieb the world leading brand of waterproof full submergible dry bags

The PD350 range is medium weight range, combining unparalleled water and weatherproof construction, thicker and heavier than the PS10 range, these bags are virtually indestructible,
easy to use even when you hands are freezing cold, these robust medium weight bags are able to protect your gear from whatever the weather throws at you,
as well as helping organise and aide you living in the field, river crossings and keeping all your kit protected, even when stored on the outside of vehicles.
 
• Available in a range of sizes, with each pack displaying its volume in liters.
• Welded seams
• Proven roll-closure & stiffener, with side buckles and D rings for securing or locking bottom loop for holding in place when unpacking.
• 100% Water & Dust Proof
• Optimal storage & packing volume with a reinforced base to provide stability and help in speed of loading & packing
 

Its suggested for complete waterproof protection, the closure of PD350 dry bags should  be rolled at least 5 times, so advisable to add 15-20 cm/5-8 in. for the total length when selecting the correct size bag you require.