Skins Men's Tri 400 Sleeveless Triathlon Top with Zip 80% Polyester/20% Elastane Imported SKINS Tri400 - maximize your potential: perform stronger, longer, with less fatigue and a quicker recovery Front semi-autolock zipper/2 pockets with bonded flaps to eliminate drag in water Lightweight Tri400 chamois provides maximum comfort/Protection with a slim profile Memory mx fabric panel strategically placed along the spine for maximum comfort and unrestricted movement Heat and pressure treated Tri400 fabric for minimized drag