Whether on foot or behind the oars, a full day of fishing wears hardest on the lower legs and seat, so the Simms G3 PRO Guide Stockingfoot Waders use 4-layer GORE-TEX Pro fabric through those areas. A waterproof, breathable 3-layer GORE-TEX upper covers the rest of these stockingfoot fishing waders. What Our Gearhead(R) Experts Are Saying:"The back yoke gathers itself to add room when I bend. That is why these waders don't fight me on long hikes between runs or on steep banks. It also fits a fleece layer on cold mornings."