The Revelate Designs Spinelock Seat Bag 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 built for stability.

• Innovative Spinelock stability system completely eliminates side to side sway
• Two mounting positions to accommodate seatpost setback and saddle adjustments
• Quick release bag from bike
• One way, low profile, air purge valve
• Carbon seatpost friendly
• Top mounted external webbing and bungee for additional storage