Curved rocker geometry follows the arc a body already makes when shifting weight, so the board rolls through a controlled range rather than tipping abruptly the way a flat disc does. The deck measures 42.1 by 11.0 by 6.5 inches, long enough for a wide stance during squats and planks yet slim enough to stand upright behind a door. Multi-layer solid wood construction carries up to 441 pounds and resists the warping that thin single-ply boards develop after months of loading. A cork base grips tile, timber and sealed concrete, holding the rocker line steady instead of skating out mid-repetition. At 8 pounds the board lifts with one hand and stores under a sofa or beside a desk between sessions. The same platform covers yoga balance holds, Pilates support work, core training and light standing desk movement through the working day. Wipe the deck clean with a damp cloth.