2026 Keystone Cougar Half-ton 26RES, The 20 26 Keystone Cougar Half-Ton 26RES is a 30' 11" rear-living fifth wheel designed for couples, featuring an L-shaped sectional, opposing slides, and 18,000 BTU AC. It has a dry weight of approx. 8,155 8,250 lbs, a 54-gal fresh tank, and includes amenities like a tankless water heater, fireplace, and auto-leveling, offering a spacious layout for its length. Key Specifications