OS1st THIN AIR PERFORMANCE CALF SLEEVES Color:Black and we did it

and we did it

At least Runner's World thinks so

The redesigned Guide 15 delivers a comfort-first sensation that takes your run to new heights

with GPS-based pace guidance for a selected course or distance

OS1st THIN AIR PERFORMANCE CALF SLEEVES Color:Black and we did itOS1st TA6 Thin AirTM Performance Calf Sleeves feature never before applied technology to keep your legs cool and protected during any activity. Created using 400n medical grade machinery and materials we are able to build in ease of use, comfort, and durability with the thinnest leg fabric profile ever made! The "Thin SkinTM" construction maximizes air flow achieving a cooling sensation to your legs thereby increasing stamina and endurance. Targeted