1.5MM throughout the neck, arms and shoulders, the 4/2/1.5MM Cato Multisport also pioneers a functionally superior material called #chamberZERO #geoprene that reflects your body's natural insulation (like the Scipio's blackZERO) and captures radiant heat inside small air chambers (like OG Hidden Chamber Technology). Balancing the body's thermostatic line with less weight and more warmth, the Cato rivals the 2MM Scipio as the lightest and warmest fullsuit on the market - pound for pound. For more details email amorvincit@matuse.com PC @tusegoose #lovematuse #ckth #da2006 #artplusfunction