Gill Men's Race Firecell Skiff Suit in 3.5mm thickness.  Small hole in the outer layer of the left knee (smaller than a dime) - see photos for details.  Has not gone all the way through to the inner lining.  Description From Gill website:The Race FireCell Skiff Suit is our most technologically advanced wetsuit yet. Using the latest FireCell zoned air technology 3.5mm Neoprene and ThermoGrid plush lining, this suit is ideal for colder conditions. Crafted with 4-way stretch, a zip-free neck opening and reinforced rubber coated abrasion protection on the seat and knees, this suit was designed to maximize your performance in the water. Compatible with the Race FireCell Top, this Skiff Suit is ideal for multitude of water activities, whether that be sailing, paddle sports or board sports such as stand up paddleboarding, wakeboarding or windsurfing.