What Nookie say :

A leap of faith if you are ingrained in the idea of shell garments with thermals, but the Ti-system is WAY, WAYYYYY BETTER than wearing a cag in warm weather. Put it on, easily because the Ti-glide material literally glides over your skin, and feel the instant comfort and protection of an über-thin neoprene shirt. The compression effect controls muscle vibration, reduces fatigue and helps to prevent injury. The tight neoprene torso grips your spraydeck and offers far better protection against water ingress than any cag waistband ever could. And the Ti-glide neck and cuffs are more comfortable and rashfree than any cag seal system, too. Oh, and this one makes you look like a superhero, too!

Construction
2mm Titanium neoprene with 
Glideskin cuffs