A support structure for supporting a user, such as a mobile device, comprising a fluid flow path with a fluid inlet and a fluid outlet, wherein at least a portion of the fluid flow path is tapered and at least partially tapered. The fluid flow path comprises first and second ends, the first end of the at least partially tapered fluid flow path is located proximal to the fluid inlet and the at least partially tapered fluid flow The second end of the passage is located distal to the fluid inlet and the width of the second end of the at least partially tapered fluid passage is at least the first of the at least partially tapered fluid passage. A support structure that is larger than the width of the edges of the.移動デバイス等のユーザを支持するための支持構造体であって、流体入口及び流体出口を備える流体流路を備え、流体流路の少なくとも一部はテーパ状であり、少なくとも部分的にテーパ状の流体流路は第１及び第２の端部を備え、少なくとも部分的にテーパ状の流体流路の第１の端部は流体入口の近位に位置し、少なくとも部分的にテーパ状の流体流路の第２の端部は流体入口の遠位に位置し、少なくとも部分的にテーパ状の流体流路の第２の端部の幅は、少なくとも部分的にテーパ状の流体流路の第１の端部の幅よりも大きい、支持構造体。
