KD Hellcat Ski TubeKD Hellcat Soft Top Ski Tube The KD Hellcat is a 3 person swept wing ski tube with a soft top deck. Wing style tubes are built for speed and glide across wakes rather than catching them, so the Hellcat runs fast and slides loose through turns. Eight soft grip handles run across the deck so three riders can hold a secure grip from any seating position. Boarding straps on the back give riders something to grab onto when climbing back on from the water.