The O'Neill Thinskins Neo-Skins Series features strategically placed Premium Skins material paired with our Recycled UltraFlex neoprene made of 85% or more recycled fibers within the neoprene liner fabrics. Designed as a super lightweight layer or to be worn alone, expanding your arsenal to fight the chill in all tropical conditions. Tailor your need for warmth with the lightest neoprene protection we offer while defending against UV exposure and abrasion.