In our Tape-hair extensions, hair is injected on polyester (the tape part) of 4*1 cm. Tapesare made to have round corners, making sure that they do not irritate the scalp in anyways. We pre-tape a high quality adhesive on the polyester to make the tape hair extensions. After thousands of tests, we finally found this exclusive adhesive that is water resistant, powerful, long lasting, and does not melt in any ways in hot weathers. During removal, this adhesive does not leave any remnants, saving you from a messy clean up process.