Lacrosse Kids' Mallard II 1000G Wader Neoprene, Spandex, Lycra, Rubber, Man Made The Mallard II are made with 100% waterproof 3.5 mm stretch insulating neoprene uppers to keep you nice and dry. If you're looking for super awesomely insulated waders, you're in luck. The Mallard II has 1000G Thinsulate Ultra Insulation for cold swamp environments. These waders are made with Brush Tuff bi-directional material that is resistant to punctures and abrasion. The buckled shoulder straps can be used as a belt when folded. This is super convenient.