Felt boots which are becoming less common, and an affordable bootfoot (also, rare).
The Clearwater Bootfoot fly-fishing wader is a terrific value felt-soled option in an updated modern fit to eliminate traditional bulk. Four-layer waterproof breathable nylon fabric is light yet durable, with a 30K Waterproofness / 8K Breathability rating. Opposing side-release buckles allow for waist-high conversion on warm days. External storage pocket with stretch panel for small items and fly boxes, plus a kangaroo-style handwarmer pocket on the front chest. Low-profile seam construction and low-profile belt loops with 1½" webbing belt included.