- 100% polyester with vinyl coating
- Fully waterproof
- Roll stop fastening with velcro securing strap
- Two adjustable side straps
- Padded and articulated shoulder straps with chest clip
- Front zip pocket
The Dry Day Backpack is from Filson is 100% waterproof wonder-sac from Filson. It’s made from some sort of fancy vinyl coated polyester and has one of those roll-top fastening things. This basically means that all your important stuff like your laptop or your top secret documents won’t get ruined in a downpour. Ideal for cyclists or anyone else who needs a good quality dry bag.