100% polyester interlock, 4 oz. per square yard; Moisture wicking, odor resistant, stain release; 44 UPF for UV sun protection; Ultra tight knit resists snagging; Fade and snag resistant for durability; UPF 30 ; Raglan sleeves for maximum mobility; 8 1/2" zipper; Lined collar and placket for support, strength and crisper look