A great wetsuit can make the difference between calling it quits after 30 minutes and squeezing in one more wave before dark. Unless you're lucky enough to surf exclusively in tropical water, a quality wetsuit is one of the most important pieces of gear you'll ever own. It keeps you warm, comfortable, and focused on surfing, not on chattering teeth, numb feet, or stiff shoulders. Fortunately, wetsuits have never been better. Over the past decade, the biggest brands have transformed what was once bulky, restrictive neoprene into high-performance equipment that feels more like a second skin. Today's suits are lighter, stretchier, warmer, and more durable than ever before. Better seam construction keeps cold water out, improved linings dry faster between sessions, and modern materials offer an impressive balance of warmth and flexibility.…