Sergio Grasso Boots Revolution N Black Agile Roles & responsibilities. The premium Sergio Grasso Rvolution riding boots Italian elegance, technical performance and comfort combined Premium Nappa calfskin leather: supple, durable and refined Microfibre inner lining: breathable, soft and comfortable SG Ultraleder interior with patented grip effect for excellent leg stability Sturdy YKK rear zip with double security lock to prevent accidental opening Padded heel protection for easy pulling 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 adapt to the calf shape High cut upper for a sleek silhouette and sporty style Classic round toe for a timeless look Oblique band with screen printed logo at the top of the upper for an elegant finish Spur rests integrated into the zip guard: multiple positions available depending on discipline