PORTWEST® Two Tone Hi Vis T-Shirt - S378 The Portwest S378 Two Tone Hi Vis T-Shirt is made with 100% polyester. This Hi vis shirt uses 2" silver reflective tape to line the chest. Contrast material is also used on the lower half of the t-shirt to protect against dirt. This two tone shirt has a UPF (Ultraviolet Protection Factor) of 50. 2" silver reflective tape 100% polyester moisture wicking fabric 50 UPF rated Taped neck seam for extra comfort Crew neck Generous fit ANSI/ISEA 107-2015 TYPE R CLASS 2 INT#10