Check the listing for details. G-Form Rugged Extended Knee Guard - Youth - YKS020. Color: Black, Condition: New. Listed at 99.99 USD. There’s nothing better than watching your youth find their line and enjoy the adrenaline pumping excitement of mountain biking. With the Rugged Extended Youth Knee Guard, you can protect your kids from the rough and tumble of mountain biking without sheltering or hindering their movements thanks to G-Form’s SmartFlex™ technology. The body-mapped pads are designed to remain flexible as they ride but offer protection as it hardens on impact for any unexpected biff. Kids gear is as prone to wear and tear as they are but fear not as the protective Armortex material adds durability so they can play hard and pedal fast without tearing up their pads. An adjustable fit-strap ensures the padding stays in place and allows some room to grow with your kid.