After Diego tried out our first prototype, he gave us some important feedback. He found that the wristband was too big for his hand, which made it impractical to use. In addition, the slot for inserting the skipping rope was too wide: the rope didn't fit properly and slipped easily.

Taking these comments into account, we designed a new prototype, more closely adapted to the size of his hand. We reduced the width of the strap and the width of the rope pocket. The new model, made from a stronger black fabric, offers better support and a more precise fit. So this prototype is more functional and closer to what Diego wanted.