- The Darn Tough® Vermont Shroom Bloom Crew Lightweight is in season. This crew-length sock is a lightweight wool blend featuring a performance fit that doesn't slip or bunch, and that's designed to help prevent blisters. Crafted with silky-soft Merino wool, these socks offer breathable, long-wearing comfort and natural temperature regulation. Lightweight yarns provide a soft, barely-there feel that's perfect for all-day wear. - Regular fit and pull-on style. - True Seamless™ toe is fused together for an incredibly smooth feel. - Reinforced Achilles cushioning adds extra comfort and durability. - 55% Merino wool, 42% nylon, 3% Lycra® spandex. - Hand wash only. - Made in the USA.