Amazon offers its Prime members the Canari Men's Microlight Shell Bike Jacket in Lava or Exto Green for $20.24 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, it costs an extra $5.58.) That's the lowest price we could find by a buck. They're available in sizes S to XXL.

Note: It's available in Killer Yellow in XL for $13.34 with free shipping for Prime members.