Intex® 68306EP Challenger™ K2 Inflatable Two Person Kayak 11' 6" x 2' 6" x 1' 3". The Intex® Challenger™ K2 Kayak is sporty and fun with a streamlined design for easy paddling. The bright green color and sporty graphics make the kayak highly visible in the water. Great for experiencing lakes and mild rivers solo, this Sports Series kayak is perfect for two adults. Lightweight and compact, this kayak is very easy to assemble and, with the Boston valve, it inflates and deflates in minutes. You can take the fun of kayaking wherever you go.