Boundless 矽膠曲線佩吉套組

The three curved probes actually stay put thanks to the snap design, which was my biggest worry before trying it. Swapping sizes mid-session takes seconds, and the silicone has enough give to feel comfortable rather than rigid.

The adjustable waist and thigh straps actually stay put, which was my main worry. Swapping between the three curved probes is quick thanks to the snap design, and the silicone has just enough give.

The waist and thigh straps adjust enough that it actually stayed put, which I wasn't expecting. Swapping between the three probe sizes is quick with the snap design, though the largest one takes a bit more patience to seat properly.