Redington Sonic Pro Wader Panel, Size Medium
I purchased these this year and used them only once. They are as close to brand new as it gets. They even come with the original packaging.

Weight is 32 ounces.

Features:
The Redington Men's Sonic-Pro Wader Pants lives for your adventures in small creeks, high-mountain streams, and lakes. Its waist-high height makes it ideal for warm summer days when you're not in the mood to layer up but still need to protect yourself from long exposure to the frigid mountain waters.
-High-tech Ultra Sonic Welded construction (no sew) and double taped seams throughout ensure your waders stay intact after many uses
-Durable, waterproof nylon 3-layer fabric with an additional DWR-coating and water-resistant zippers seal out the wet and keep your baselayers super dry
-Breathable fabric allows vapor from sweat to pass through while blocking out water
-Articulated seams provide unrestricted mobility when you're fighting the big one
-High-density, ergonomically shaped neoprene booties protect your feet from the wet and cold
-An adjustable waist band and removable suspenders offer convenience and a comfortable fit
-An internal welded storage pocket stashes your cell, dry shake, and other small essential
-included mesh carry bag for convenience

These retail for $249, price is $145 with free shipping in US