The Mallard™ Waders are constructed of 100% waterproof 3.5mm neoprene, which stretches for a personalized fit and has a multi-directional puncture resistant covering for durability. They provide the ultimate waterproof and insulating protection for cold wading applications. With 1000 G. Thinsulate™ Ultra Insulation in the boots, these waders keep feet warm, dry and comfortable.