The 'Field Trip™' is Weld's most popular hat style with its 5-panel unstructured crown. Its build is derived from nostalgia for vintage workwear hats. The timeless hats are made of soft, corduroy fabric and feature a fabric strap with a brass metal clasp. Corduroy Fabric Fabric Strap with Brass Metal Closure. One Size Fits All. Earthy Tone.