I have been wearing the white Hanes v-neck undershirts under my collar shirts for years, and love them. One of the things I like about those is that the V is big enough that you can't see the shirt under the collar shirt. Not so with this product. For some reason, the black and grey versions have neck holes that are only slightly bigger than a crew-neck. Also, be aware that the grey shirts are 25% polyester. It's stated in the description, but you might miss it. The black versions claim to be 100% cotton, but they feel the same as the grey, and neither color passes the important test of drying my glasses. Hanes' white cotton shirts soak up the water; their black and gray shirts just push it around.