Mares Long Sleeve Thermo Guard is very easy to put on, provides great SPF 50+ UV protection and the Metalite coating helps retain heat for superior warmth. Mares Long Sleeve Thermo Guard features super elastic neoprene and flat stitch construction for comfortable contact on your skin. Thermo Guard offers more body core protection than a standard rash guard ... perfect underneath your wetsuit for better heat retention during diving. 
 

Refer to Mares Size Chart for proper fit.