Hand sew the velcro to the blanket and the bed.I suggest stitching the delicate part of the velcro on the blanket and the stiffer more uncomfortable part of the velcro on the bottom of the mattress. K&H outside beds and pads are designed to warm to your pet’s normal physique temperature of 102°F when he/she lies on the bed or pad. When your pet is not on the bed or pad, the warmth will dissipate into the air and the surface temperature will vary according to the ambient air temperature.