Mens sizes have round neck design.
The Italian made fabric is rated UPF 40+, super soft, 110gsm (i.e. super light weight), antibacterial and moisture wicking. They almost feel like your not wearing anything they're so light. Men's cut have a crew neck and women's cut has a v-neck.
Wear these for extra sun protection or as an additional layer as the weather starts to get a bit cooler.