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