The Tommy John 360 Sport 4 Inch Hammock Pouch Trunk - 2 Pack 1003351 provides performance properties for all you active pursuits with mesh knit zones at front back and between legs, fabric that wicks with quick-dry action, 4-way stretch, and has an H fly-front so that you can easily use it if you're right or left-handed. Tommy John's 360 Sport 4 Inch Hammock Pouch Trunk - 2 Pack is made of polyester/spandex.