A multi-band, small, high gain, low specific absorption rate (SAR), and circularly polarized (CP) textile wearable antenna fed using aperture coupled technique is designed on two layers of denim (ε r ¼ 1:2, h = 0.787 mm as feeding layer) and felt (ε r ¼ 1:3, h = 1.5 mm as a resonating layer) textile substrates.