During batting practice, proper sizing holds the Laser Power ST (Exoprecise ROM1 model) for all body shapes/sizes. Exoprecise ROM2 models, bridging the top-half (Exoprecise) to the core/hips (ROM2 Axis Stabilizer), accommodating the simultaneous, lifting of both arms above shoulder-height; the extra support is helpful for players, matching the criteria below, preferring a greater margin for error when sizing:
Deciding, to lift extremely-high; both arms straight and up, using a two-handed follow through.
Female athletes, for example, fastpitch softball players; bigger than a B cup, bra-size.
Extra-small youth players with skinning arms.
Wearing loose and thick sleeves for batting practice, reducing the hold of the ROM1 Stabilizers.
"One of the Pony League teams, even though, not an elite junior team, are beating the elite middle school, baseball teams; they are using the Laser Power ST." - South Korea
LASER PST
"When I do this, straight back, I feel the muscle contraction... you're doing the right thing." - Federico Giordani, Team Europe, L.A Dodgers Prospect.
LASER PST
"Proud of my boy, U/17 All Australian, State League, batting champion, making the All-Star team, another great result for the product, thanks." - Colin Smalpage, proud father of Jack Smalpage