Montana Fly Fishing Gear Fly Wallets, This is a 2 Shearling Panel Fly Wallet, which holds about 300 trout flies. The shearling wool holds flies very securely yet are easily removed. The wallet is made of 18oz waxed canvas twill and there are pockets behind each piece of shearling. Its durable, flexible, water resistant, it floats, and drys quickly. This fly wallet is handcrafted and is a classic alternative to plastic and foam fly boxes that wear out. Our wallet is biodegradable but will last a lifetime.