Comes in xx-small, x-small, small, medium, large, and XL. Each vest comes pre-loaded with 10 lbs of weight. Additional booster packs with 5 lbs of weight are sold separately along with a tool for insertion.
Trey Hardee
US Olympic Decathlete
Gold Medal Winner in 2009 World Championships
Trey has been using the Hyper Vest PRO weight vest in preparation for the 2009 season: "I have never seen or used a weight vest like the Hyper Vest PRO. It stays tight, comfortable and cool on my body enabling me to increase my bodyweight while training. It makes adding resistance to my workouts effortless and I would recommend it to any track and field athlete who is looking to take the next step."
James Cotter
Pro-Triathlete using the Hyper Vest PRO and Hyper Vest COOL
"I often wear a Hyper Vest PRO during a trail run or speed work on the track. Just 6 pounds added to my body weight is actually quite challenging and it definitely has helped increase my leg strength. Hyper Wear also has a cooling vest, the Hyper Vest COOL, to help athletes cool their core before training or competition. I got to try the prototype out for a couple of weeks until I received the real deal. I used it before and after long rides as well as on the trainer. It helped keep my body temperature down which is a tremendous help. I read claims by Nike that their precool vest provided to olympic athletes in Beijing could improve performance 21%."