This Breast Self Examination (BSE) Trainer is a flesh-based product for realistic practice. You will no longer have to struggle with keeping the exam model clean because the new, nontoxic material is very stain resistant and cleans up easily with mild soap. Within the breast resides five lumps representing different disease states: cysts (fluid related), fibroadenomas (calcifications), sclerosing adenosis, or fat necrosis. www.komen.org is a website with information pertinent to BSE. The filling is a water-based gel that emulates the natural consistency of a breast. The material is also very durable so that constant use in labs or teaching facilities won™t wear it out or tear it. Ship weight 1.25 lbs.