Imveliso ye-mattress-umatrasi eyenziwe ngokwezifiso Ukutyhubela iminyaka, besiqokelela ingxelo yomthengi, sihlalutya amandla oshishino, kwaye sidibanisa umthombo wemarike. Ekugqibeleni, siphumelele ekuphuculeni umgangatho wemveliso. Enkosi kuloo nto, ukuthandwa kukaSynwin kuye kwasasazeka kwaye sifumene iintaba zophononongo olukhulu. Ngalo lonke ixesha imveliso yethu entsha isungulwa eluntwini, ihlala ifunwa kakhulu.
Imveliso ye-Synwin umatrasi-umatrasi owenziwe ngokwezifiso. Iqela lethu loyilo liqulunqwe ngumyili onobuchule onoxanduva lokwenza izigqibo malunga nendlela inkqubo yokuyila ekufuneka ivele ngayo, kunye nenani labayili bezobugcisa abakhethekileyo kushishino iminyaka. Sikwaqeshe iingcaphephe zeshishini ukuba zilawule inkqubo yemveliso ukusuka ekukhethweni kwemathiriyeli, ukusetyenzwa, ulawulo lomgangatho, ukuya ekuhloleni umgangatho.bonnell ekwenziweni koomatrasi wasentwasahlobo, ulwakhiwo lwe-bonnell spring umatrasi, bonnell spring system umatrasi.