ERGONOMIC DESIGNadjustable and comfortable angle to support your legs. ^^FLAT TEXTURE DESIGNmassage foot to release your pressure. ^^FLOATING ADJUSTMENT0-20 ° stretch the legs to promote blood circulation. ^^SCRATCH RESISTANTScratch proof rubber feet prevent the floor from being scratched and protect your feet. ^^RUBBER MANUFACTURINGmeet the worlds most rigorous chemical emissions standards, to create a healthier environment for you.