Amazon.com | Simms Freestone Boot - Rubber Gunmetal 5 | Rain。Designed specifically for fly fishing, these boots feature a durable brown leather upper with a padded olive-colored collar. A key characteristic of these boots is the felt sole, which provides traction on slippery, mossy riverbeds. This specific model is a classic design from Simms, often sought after for its durability. Purpose: Fly fishing and wading in rivers or lakes. Upper Material: High-quality leather with a padded ankle collar for support. Sole Type: Traditional felt sole for superior grip on wet, underwater surfaces. Lacing System: Traditional metal eyelets and speed hooks for a secure fit.