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What Run Oregon is Trying: SealLine Dry Sack and Urban Waterproof Backpack

Run Oregon sometimes receives products to review. In this post, Annette Vaughan and Geli Heidelberger provide some initial impressions of the SealLine BlockerLite Dry Sack and Urban Waterproof Backpack. Company: SealLine, a brand of Cascade Designs Our dry bags, portage packs, backpacks and dry sacks are designed and tested in Seattle by engineers who know and live these core sports. They match materials and design to create the most specialized, high-quality waterproof gear available. Each product is designed in Seattle by technicians who draw on over 30 years of RF-welding experience. The differences in what we do matter, and they allow SealLine gear to stand up to any weather or water on Earth. Products: BlockerLite Dry Sack 2.5 liter ($15.95), 5 liter ($18.95), 10 liter ($21.95) Urban Waterproof Backpack, Small ($149.95)

5L Dry Sack

Annette’s Impressions of the Dry Sack:

Our lightest, most efficient-packing dry sack, the ultralight BlockerLite boasts a patent-pending rectangular shape and strong fully welded seam construction to deliver waterproof protection while organizing clothing and gear in your pack.

The SealLine BlockerLite Dry Sack is extremely lightweight. The 5 liter dry sack is just 1.2 oz. – almost like it’s not even there. I appreciate being able to throw items into something that is waterproof, but not bulky or stiff.  The rectangular shape of the dry sack allows for keeping your items in a space-saving “block” if you choose to load it up and pack it in your backpack or duffel bag. The seams are welded, not sewn, so that lends to the block-like shape. Like most dry sacks, it has a roll down top with a clip to keep the items inside secure and dry.

When the weather improves and I am out kayaking, the dry sack will be ideal for packing smaller items to put into my dry bag. For now, this dry sack will work great for putting items in a backpack for a day hike or packing dry clothes for after a rainy day race. I think it will also come in handy for throwing my wet clothes into post-race so that I can put them back in my duffel bag without getting everything else wet.  With dry sacks from 2.5 to 20 liters, SealLine has about any size you’ll need for a short or long outing in the not-so-dry Pacific Northwest.

Geli’s Impressions of the Dry Sack:

Since moving to Oregon several years ago, my family has enjoyed the outdoors year round. Of course there’s always a chance of things getting wet or dirty, whether you’re on a kayak on the river, on the beach, or hiking a trail. The various sizes of BlockerLite Dry Sack is a welcome addition to my gear. The 2.5L bag measures just 5×3″ and is a perfect size to hold your phone, camera, and keys and keep them protected. When you add a bit of air to the bag before sealing, that might assist in keeping your valuables from sinking to the bottom off the lake, should they fall out of your boat. The small bag will also be great for my Boy Scout to keep his spare sock dry during foul weather hikes and campouts. The 10L bag measures 4.5×8″ when empty, and is a great help in organizing your backpack or luggage. When you choose the bags in varying sizes and colors, you can color code your luggage while at the same time protecting your things from the elements.

Annette’s Impressions of the Urban Waterproof Backpack:

 Lightweight and rock-solid, our RF-welded Backpacks offer seamless all-weather commuter protection. A watertight roll-down closure with QuickClip attachment provides easy access, and an optional organizer slips onto the internal frame sheet, neutralizing even the fattest Monday-loads. On the outside, you get good looks, a weatherproof zip pocket and our Modular Accessory Pocket system for attaching add-ons like a Zip Pocket or Mobile Electronic Case. A light clip-loop helps keep you visible and a deluxe, waterproof and ventilated suspension with carry handle and stowable waist belt keep you rolling in any weather.


The Urban Backpack is designed with the bike commuter in mind. If you are looking for a solid waterproof carry-all for your bike commute, this backpack is the way to go. I have the small backpack which is ridiculously roomy at 15″x 4″x 18″. Loading up the backpack with a laptop, files, and even food and a water bottle is no big deal. The top rolls down similar to a dry bag to keep the contents dry and has a super easy clip that can be attached with just one hand. The outer zip pocket is also waterproof, so you can even stick your phone or anything else in without worrying about the rain. While the backpack material is somewhat stiff in comparison to a hiking backpack, it doesn’t seem to be an issue for biking. Just feeling this backpack will give you confidence in its ability to keep your things dry on your rainy day bike commute. The straps are adjustable and you can also utilize the waist belt to secure the bag if desired.

I tend to put my bike away once the rainy season hits, but this waterproof backpack could be used in a variety of situations. I believe I will use it most often for keeping things dry in my kayak for a day on the river. You could even use it for a day hike – if you don’t mind the stiffness of the bag while hiking, or to keep things dry on a camping trip.

In the short time I have had the dry sack and backpack, the SealLine products seem to be good quality multi-use waterproof items. I wouldn’t hesitate to recommend them to someone looking for good waterproof gear for the wet Pacific Northwest weather.

About Annette Vaughan (479 Articles)
Annette Vaughan is a runner, personal trainer, and race director in Canby, Oregon. She began running at the age of 30 and became hooked after her first race (even though she is a self-proclaimed slow runner.) She enjoys small local races from 5Ks to half-marathons, with a 30K on the books as her longest run ever. She has also become a huge fan of obstacle course races and just can't get enough of them. Annette is the race director for Get A Clue Scavenger Race and owns a personal training studio in Canby. She believes in promoting movement, since our bodies were designed to move. The more we move, the better we move and function in everyday life.

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