Material: 100% pure acrylic sheet, three layers fiberglass and pure resin. bottom with 304 stainless steel supporting bar.with drain system.
What are the advantages of acrylic bathtub?

Affordable
Resistant to cracking and chipping
Easily repairable
Smooth, nonporous, comfortable surface
Retains heat; remains warm to the touch when dry and at room temperature
Many color, size, and configuration options
Lightweight.
Durable, especially when reinforced with fiberglass (a common option)
Easy to clean and maintain.                                              

with seamless line(beautiful appearance) and free standing in the bathroom, easy to install.