Ion Protection Wear Amp Vest Lightweight, Breathable Back and Chest Protection If you're an enduro or downhill mountain biker, you will appreciate the protection of a padded vest. The Ion Protection Wear Amp Vest provides lightweight, breathable back and chest protection with a low profile. It provides full coverage of the back through an extended and removable SAS-TEC L1 protector. It features easy access with a Safe-Lock Zipper, elastic back inserts with a grippy hem, stash pockets, 3D mesh ventilation, and breathable mesh inserts to help keep you cool in warm weather. Features Full SAS-TEC back protector and light and flexible SAS-TEC L1 chest protector Easy access with Safe-Lock Zipper3D mesh ventilation and breathable mesh inserts Sizing Size Extra Small Small Medium Large Extra Large XX-Large Arm Length (in)27. 5 - 28. 5"28. 5 - 29"29. 5 - 30. 5"31 - 31. 5"32 - 33"33 - 34"Chest Circumference (in)34 - 35. 5"33. 5 - 37"37. 5 - 39"39 - 41"41 - 43"43 - 45"Waist Circumference (in)29. 5 - 31"31 - 33"33 - 35"35 - 36. 5"37 - 38. 5"39 - 40. 5" | Ion | Protection | Wear Amp Vest Men's | Size Small In 900 Black