Whether you want to keep your kit dry or just compress your gear for better packability these compression bags and stuff sacks should be just what you're looking for. You'll find great solutions to help you protect your kit with products from great brands such as Exped, Equinox and Outdoor Research.
Outdoor Research Dry Ditty Sacks (Set Of 3) 37932
Outdoor Research 20L Airpurge Dry Compression Bag 37534
Outdoor Research 15L Ultralight Compression Sack 37487