Alpinestars Black and Yellow Fluro Adult Bionic Rib Support Suit The 4100 Series seats use

The 4100 Series seats use Racetech RTB1009M alloy side mounting brackets $270 or Steel RTB2009S brackets $190 (sold separately)

The Alpinestars exclusive multi-compound one piece toe and heel counter features an ergonomic polypropylene heel counter with integrated insole for optimum foot support

the new Tech-1 KX V2 is now lighter and more breathable with a revised asymmetric lacing system to conform more closely to the foot

Stilo helmet adapter

Alpinestars Black and Yellow Fluro Adult Bionic Rib Support Suit The 4100 Series seats useA high performance, lightweight, ergonomically constructed guard for the ribs and kidneys, the Bionic Rib Support incorporates intelligent adjustment features to offer kart drivers a supremely comfortable, customized and supportive fit. Construction Technical, multi layered main construction for optimized performance fit, protection and comfort: Comfort: Advanced, soft poly lycra inner lining means protection can be worn under or over the garment.