ASICS HN2-S PROTOBLAST Kiko Kostadinov Steel Gray - The shoe has an energetic silhouette that inspires your body and mind to keep moving. The upper borrows key elements from the GEL-100™ series. Meanwhile, the tooling and toe design are inspired by the GELHOOP™ 6 volleyball shoe. It mirrors the cushioning of the NOVABLAST™ 2 running shoe.