Its clean lines, multiple attachment options, water resistant outer and access options have made the Exp[ed Serac  my go to backpack for multi-day packrafting trips.  The rolltop closure ensures a dry inner and the triangular over strap holds a packraft on top of the pacck. The front pocket easily holds those must get to items when journeying overland - without the need to be delving inside the main compartment.   
 
The daisy chain attachement points on the sides and front means that paddles are securely stowed by adding a short length of elasticated chord - such as the Bag mounting kit.
 
Combine it with the Exped Flash Pack Pocket to easily stow your water shoes and wet outer gear.  
 
Here's what Exped have to say... 
 
The Serac 45 is a minimalistic Alpine pack with roll-top closure and a side-entry zipper for easy access to the taped main compartment. A generous front pocket for a shovel blade, ski skins etc. An excellent ski attachment system and various anchor points for additional gear make this the perfect pack for all-season use in any weather condition and challenging multi-day adventures and expeditions.