You need protection specially when on traning. This armor gives ultimate protection to all the upper body including spine. ____________This is a serious piece of body armor with a variety of uses. This armor can be worn as it is alone or under or over tshirt._________The entire jacket is very light and feels like you have nothing on but yet it is nice and snug (This is what you want in body armor in case you crash the armor will not role off) but yet it is very comfortable. You can wear your current jacket/jersey over this armor shirt and you will be very comfortable. ______________Your getting this armor at a very inexpensive price and direct from the manufacturer. ____________Suggested Retail Price (msrp) of these armors is: US$ 300+.