We spoke with our classic seat pack and asked it to create a way better version of itself. The result is the seat pack XT. The XT has Timbuk2 signature wide-mouth opening for quick and easy access, blinky light attachment and reflective hits for safe night riding, plus waterproof accents and a new attachment system. The bungee seat post attachment is a CINCH to use and the accompanying SR buckle makes it easy to attach to rails and adjust until you're comfy. You'll want to ride it everywhere.