There’s nothing worse than setting up camp and finding your gear has got wet and knowing that you’re going to be wearing damp gear or, worse, climbing into a wet sleeping bag. That’s why we only stock the best quality lightweight dry bags. These Exped Bags have been trusted companions on many a adventure and as yet, they’ve never let us down. 
 
The Medium is more than capable of holding a SPIII Sleeping bag.
I use the XS for a down jacket.
 
These Lightweight and waterproof drybags with a white lining for excellent view of contents. . Taped seams and equipped with grab handle, quick release buckle and D-ring. 
 
4 Pack consists of the 4 sizes XS, S, M and L.