Revelate Designs set out to create the most stable, low profile mounted, feature loaded, waterproof seat bag available. 

The Spinelock integrates user tested and approved features like a one-way air purge valve, rear light slots, loop and bungee deck, and an external plastic bottom with a new patented attachment system. Stability was the driving element in the design process. If you want something you can pack and forget, the Spinelock is your seat bag. 

Details:

• Innovative Spinelock stability system completely eliminates side to side sway
• Waterproof construction
• Two mounting positions to accommodate seatpost setback and saddle adjustments.
• A low profile, high strength, forged aluminum clamp works in combination with precision IGUS bushings to form a quick-release pin interface making bag removal a cinch.
• Quick release bag from bike
• Internal HDPE plastic structure
• One way, low profile, air purge valve
• Carbon seatpost friendly
• Hypalon slots for a rear light
• Top mounted external webbing and bungee for additional storage
• Protective external plastic bottom frame sheet
• Active cam buckles prevent side straps from slipping on rough terrain.