if you work up a sweat getting to your fishing spot the moisture resistant breathable insulation keeps you warm even when moist. A fleece upper ensures comfort where you need less insulation above the water.##To install the Core INS system in a few minutes follow these easy steps. You can also watch the instructional video at www.hodgman.com##1. Lay the wader and the liner face up next to each other on the ground.##2. Unbuckle the shoulder straps to allow access to the inside of the wader. (On the drop top designs included on the Aesis Sonic waders remove the Velcro attachment point located on the rear buckle instead of unbuckling the front of the wader).##3. Reach inside the wader and pull the right leg of the wader inside out to expose the connection snap points located at the inside top of the stocking foot bootie.##4. Connect the liner to the wader by snapping the corresponding green snaps to green connection points on the wader and the red to red connection points. Then snap the front and back connection points in place. (Be sure the leg on the Core INS liner is not twisted)##5. Reach inside the wader and pull the left leg inside out and connect the corresponding red