Olefin-based polymer

An olefin-based polymer, which has:

• a density (d) ranging from 0.850 g/cc to 0.865 g/cc;
• a melt index (MI, 190° C., 2.16 kg load conditions) ranging from 0.1 g/10 min to 3.0 g/10 min;
• a soluble fraction (SF) of 10 wt % or more at −20° C. in cross-fractionation chromatography (CFC), in which a weight average molecular weight (Mw) of the soluble fraction is in a range of 50,000 g/mol to 120,000 g/mol;
• a vinyl group content per 1,000 carbon atoms of 0.06 to 1, which is determined by infrared absorption measurement;
• a MFR10/MFR2.16 of 8.5 or less, which is a ratio of a melt flow rate measured ASTM D1238 at 190° C. 10 kg load and ASTM D1238 at 190° C. 2.16 kg load;
• and
• a hardness (H, Shore A) defined by the following Equation 1:
• H=1293×d+A, [Equation 1]
• in Equation 1, A satisfies Equation 2 or Equation 3 below:
• Tm×(0.855×Tm−62)<A<d×−1238, [Equation 2]
• d×−1238<A<Tm×(0.855×Tm−62), [Equation 3]
• in Equations 1 to 3, H is the hardness (shore A), d is the density, and Tm is the melt temperature.