2 Ice boots with 6 CryoPacs. 
These  cool the leg down after a long ride within 20 minutes, 
They are pliable allowing them to fit around any leg, held on by heavy duty Velcro.
CryoPaks are replaceable.
 
Offered in 5 colors Blue, Red, Purple, Black and Neon Green.  
 
***They work great on Riders, too....cool down that sore knee, back, ankle or neck!