Fabric:3.6 oz., 52% combed and ringspun cotton, 48% polyester; 40 singlesTriblends - 3.8 oz., 50% poly, 25% combed ringspun cotton, 25% rayon, 40 singlesMarble colors are 4 oz., 91% polyester, 9% combed ringspun cotton, 30 singlesNeon colors are 3.6 oz., 52% combed ringspun cotton, 48% polyester, 40 singlesSideseamedFeature:Contrast raglan sleeves and neck trimUnisex sizing; retail fitDisclaimer: neons are brighter than they appear online