Soaker for use in bed that is made of 4 layers, the first being 50% cotton and 50% polyester, the second of cellulose, the third of TST and the fourth with vinyl, which can absorb 2.5 liters of liquid per m3, to avoid staining the mattress. It is washable, both by hand and machine, and resists up to 300 washes. It is recommended not to use fabric softeners or coloured bleach.