SealLine

Frequently Asked Questions

• What sets SealLine dry bags apart from other waterproof gear?

  SealLine focuses on purpose-built designs and materials tailored to specific paddling and expedition needs, combining features like the DRYSEAL™ roll-top, SEALLOCK™ dual-track zipper, PURGEAIR™ valve, and Continuous Compression to balance durability, weight, and packability. The brand also offers distinct product lines—such as the Pro™ Dry Pack and Pro™ Zip Duffel—so you can choose gear optimized for day trips, multi-day expeditions, or submersible protection rather than a one-size-fits-all approach.
• When should I choose a DRYSEAL™ roll-top closure versus a SEALLOCK™ zipper?

  Choose the DRYSEAL™ roll-top if you want a quick, intuitive seal that sheds water and compresses pack contents for paddling or general wet-weather use. Opt for the SEALLOCK™ dual-track zipper when you need confidence against submersion or fast access to gear—it’s designed to be fully submersible and is ideal for technical boat hauls or gear that must stay bone-dry.
• How does the PURGEAIR™ valve work and why is it useful?

  The PURGEAIR™ valve is a one-way waterproof valve that lets trapped air escape from the bag without letting water in, making it easier to compress and stow bulky items. It’s more durable and consistent than fabric membrane vents or manual squeeze valves, helping maintain pack volume and buoyancy control on watercraft.
• Which SealLine bag is best for day trips versus multi-day adventures?

  For day trips and lightweight outings, the Skylake™ Dry Daypack (around 18L) offers a stowable, low-bulk waterproof option. For multi-day or gear-hauling needs, the Pro™ Dry Pack (70L and 120L) and the Pro™ Zip Duffel (40L, 70L, 100L) provide larger capacities, supportive carry systems, and choices between roll-top and submersible SEALLOCK™ closures; the Black Canyon™ Dry Pack suits those needing a large, rugged pack (65L and 115L) for longer expeditions.
• Are SealLine products environmentally friendly or PVC-free?

  SealLine actively pursues PVC-free alternatives across its line where performance allows, and designs emphasize long-term durability (Continuous Compression and reinforced seams) to extend product life. The brand also manufactures products in the same markets where they’re sold to reduce transport-related impact, reflecting Cascade Designs’ broader sustainability and materials efforts.