Fabric: Polyester /Nylon - Fabric is very nice
Anti - UV 
Quick Dry 
Breathable 
 
Sizing: 
S - 110cm - US 5 -Height 42 - 46" Weight 37-48 lbs. 
M- 120cm - US 6-7- Height 46 - 50" Weight 45 - 55 lbs.
L - 130cm - US 8 - Height 50 - 54" Weight 52 - 64 lbs.
XL - 140cm - US 10 Height 54 - 58" Weight 62 - 80"
 
NOTE:  Safety Feature: Snaps at bottom of tail allow you to let childs feet to be free when swimming.