Vortex Waterproof 6L Seatpack

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A compact, waterproof seat pack with intelligent features, the Altura Vortex 6L is perfect for cyclists looking for durable and adjustable storage on their next adventure.

Altura says: 

Essential to any bike packing adventure, our waterproof seat pack range has welcome updates including improved stability and cushioning.

The Altura Vortex Large Cycling Seat pack is a fully waterproof essential for multi-day adventures with improved stability from the previous model, added cushioning and glove compatible buckles which allow you to access your belongings quickly and conveniently when needed.

Engineered from Nylon Ripstop with TPU coating it is fully waterproof with welded seam construction and comes in three generous size options giving you the choice between 17, 12 or 6 litre capacities.

The 17 and 12 litre versions include a handy bungee cord for extra storage and they are also compatible with the Altura Anywhere Dry bag range. The roll closure allows you to adjust the volume of the seat pack to fit the contents whilst the reinforced inner prevents them from becoming crushed against the seat post.

Reflective details and light attachment loops help to keep you visible in lower light conditions making it ideal for any adventure.

Our Verdict

The Altura Vortex Waterproof 6L Seatpack is a solid, compact option for bikepacking adventures. It offers fully waterproof protection in a lightweight design. Weighing 359g, this setback features a roll-top closure that allows you to adjust the volume between 4 and 6 litres, perfect for carrying essential gear without bulk. The welded seam construction and TPU-coated ripstop fabric ensure your belongings stay dry, even in wet conditions.

The pack has been updated for improved stability and added cushioning, making it more comfortable and secure on longer rides. Glove-compatible buckles and reflective details add practical touches, while the reinforced inner prevents your gear from being crushed against the seat post. With light attachment points and compatibility with Altura Anywhere drybags, it’s a well-rounded solution for those seeking reliable storage on multi-day trips.

– Reviewed by Ultralight Outdoor Gear

Features

• Waterproof, welded seam construction
• Nylon ripstop fabric with TPU coating
• Compatible with Altura Anywhere drybags
• Adjustable volume via roll closure
• Reinforced inner to prevent crushing against the seat post
• Reflective detail
• Light attachment points

Specifications

• Weight: 359g
• Dimensions (cm): 36 x 16 x 18
• Capacity: 4-6L

Material & Construction

• Nylon Ripstop with TPU (thermoplastic polyurethane membrane) coating