All njoy toys are cast in 316 grade stainless steel, and hand-polished to a mirror shine. There are cheaper grades of stainless available, but we won’t use them – the 316 material provides superior corrosion resistance, a deliciously deep and lustrous finish, and added strength and toughness (although we really can’t believe that will ever be an issue!). Our manufacturing specification calls for medical-grade materials and finish, so you can play in the safest manner – if it’s good enough for your grandmother’s hip replacement, it should be good enough for you-know-what(!) Our toys are absolutely non-porous, and can be cleaned and/or sterilized by any means. Stainless steel has low ‘specific heat’, which means that –yes- it’s cold to the touch, but it will warm rapidly to body temperature. Of course if you’re partial to temperature/sensation play, a few minutes in the fridge (avoid the freezer please!) will provide a rather ‘chilling’ experience; and likewise a short dip in a bowl of warm water will yield a luxuriously warm and sensual toy for your pleasure. About the only thing you can do to damage your lovely njoy toys is to use an abrasive to clean them, so please don’t.