Product Details Designed To Be Used For Both Hot And Cold Treatments, This Pad From Lansinoh Provides Relief From Pain And Discomfort After Childbirth, C-Section, Postnatal Uterine Cramping And/Or From Haemorrhoids. Use Cold For Cooling Pain Relief From Childbirth, C-Section Or From Haemorrhoids Or Use Warm For Soothing Relief From The Discomfort Of Postnatal Uterine Cramping. Moulding To The Body And Staying Flexible After Freezing, It Is Safe For Use Postpartum And While Breastfeeding. How To Use: For Cold Therapy: Freeze Pack For 4 Hours Before Use. For Heat Therapy: Microwave For 25S (700W)/ 19S (1000W)/ 16S (1250W). Gently Massage Pad To Evenly Distrubute Heat As Indicated By Colour-Changing Pearls And Test Pack Prior To Use. Add Time In 5 Second Increments Until Desired Temperature Is Reached. Alternatively Submerge In A Water Bath That Is No Longer Boiling For 1-2 Minutes. After Heating Or Cooling, Place One Pack Into The Disposable Sleeve And Apply Pack For 20 Minutes Or As Recommended By Your Doctor.