sentences:  In collaboration with the fishermen, Echelman created a series of netted sculptures, her "Bellbottoms" series.Echelman has developed aerial sculptures into structures machine-woven from polytetrafluoroethylene (PTFE) and ultra-high-molecular-weight polyethylene (UHMWPE) and suspended from skyscrapers.The lightweight surfaces of these sculptures shift and ripple with air currents, an effect which may be enhanced with projected light and fans; these are often installed so the audience may interact with the sculpture, reinforcing Echelman's theme of interconnectedness.