The Rip Curl Mens Dawn Patrol Perf 2/2MM Chest Zip Short Sleeve Steamer is the best steamer for the guy who wants to keep warm, but feels the heat up the top. The steamer features a front chest zip and is made from Rip Curl's unique E5 Neoprene that has high stretch and is lightweight. The Steamer also features Rip Curls unique E4 Thermoflex Back Mesh skin panels for maximum solar absorption while reducing wind chill.