Can I wear the Hyper Vest without a shirt?

Yes, you can wear the Hyper Vest without a shirt.  You can wear a wicking or cotton blend shirt under your Hyper Vest or you can choose to wear the vest without an under layer.  For longer runs or more intense training we recommend you try it first with a shirt or under layer.  

 We recommend that you begin any new fitness routine or use of product slowly so you can see how the product performs and effects you.