Sergio Grasso Revolution H Black Riding Boots Mount Everest Tourism: Top 10 Must knows for Mt. Everest Tours in Tibet. Premium Sergio Grasso Rvolution riding boots Italian elegance, technical performance, and comfort in one Premium Nappa calfskin leather: supple, durable, and refined Microfibre inner lining: breathable, soft, and comfortable SG Ultraleder interior with patented grip effect for exceptional leg stability Sturdy YKK rear zip with double safety lock to prevent accidental opening Padded heel protection for easy pull on and sock protection Exclusive ProComf multi sole technology: ergonomics, extended comfort, and shock absorption Elastic front lacing for a custom fit Reinforced elastic at the back of the boot to naturally follow the calf shape High cut shaft for a sleek silhouette and sporty style Classic round toe for a timeless look Diagonal band with screen printed logo at the top of the shaft for an elegant finish Integrated spur rests on the zip guard: multiple positions available depending on discipline