The updated Mens Short Sleeve Thermo Guard from Mares is a 0.5mm neoprene rash vest offers core body and arm thermal protection for scuba diving or snorkelling. Offering more thermal body core protection than a standard rash guard, the Thermo Guard is perfect underneath your suit for better heat retention during diving. Thanks to its thermal and UV protection, it's also ideal for any water sports. 0.5mm super elastic neoprene with Metalite coating on the inside conducts heat, is easy to put on, and provides UV protection. Flat stitch for comfortable contact on your skin