NeoSport Wetsuits Men's XSPAN Long Sleeve Shirt Constructed from 1.5mm XSPAN this shirt feels and wears more like spandex or polyolefin then neoprene. Anatomical cut with a specially extended shirt tail to provide maximum coverage while in use. 250 percent all way stretch XSPAN neoprene provides a form fit that locks out water and limits water exchange. Flat lock seams assure maximum comfort and durability. While in use, all shirts also feature a no zipper design.