The Radar Session was built with stability and ease in mind. With more surface area, getting out of the water is a breeze, and once you're up, you'll feel like you're floating with the level spine and grip rails reducing drag. All-Terrain construction makes crossing wakes and rougher water simple and smooth. Like all Radar Skis, the Session is built with 100% carbon laminates. The Radar Open Water series allows skis with more volume to ski at a high level with superior balance and support. It's undeniable that surface area is your friend in skiing; it pops you out of the water with ease, and it gives you the ability to float on top of the water. That surface area, matched with a flat spine and the next evolution of Grip Rails, has resulted in a ski that's even easier to ride and has less drag. The Session will change the way you view a sheet of glass. Go rip it up!• Most forgiving construction with All-Terrain Core• 100% carbon fiber for consistent flex every time• Grip Rails 2.0 allow your ski to engage with easetable, th, td {border: 1px solid black; border-collapse: collapse;}th {text-align: left;}th {padding-left: 6px;}td {padding-left: 6px;} Size Surface Area Max Width Suggested Speed Terrain Rider Weight 65" 416.13 sq. in. 7.76" 20-30 mph Open Water up to 160 lbs. 67" 442.13 sq. in. 8.00" 20-30 mph Open Water 130-190 lbs. 69" 468.92 sq. in. 8.24" 20-30 mph Open Water 175-230 lbs. 71" 482.51 sq. in. 8.24" 20-30 mph Open Water 220+ lbs. Level spine and grip rails reduce drag All-Terrain construction makes crossing wakes and rougher water simple and smooth Built with 100% carbon laminates for consistent flex every time | Men's Session Slalom Waterski, Blank size 65