The Bluegrass Super Bold helmet was made for riding in concrete skateparks and for maximum protection for riders who focus on dirt jump and other gravity disciplines. It's a durable helmet that will stand up to long-term and intensive use. An adjustable fit system that wraps around the entire head keeps the helmet firmly in place, even when the rider is trying to perform the most acrobatic tricks in their repertoire. Weights and sizes S - 370 g M - 440 g L - 510 g S - 51-55 cm M - 56-59 cm L - 60-62 cm