Sleep is a state where our body and mind rest after a full day's work. Sleep is important as it allows your body and mind to recharge. Sufficient sleep keeps you healthy and ensures that your brain is able to function properly with sound thoughts and concentration. If you are promoting good health through sleep, you can find a variety of sleep related concepts right here in our stock image collection. From baby, man or woman sleeping or napping, to tired people yawning, animals sleeping or even with concepts highlighting sleep deprivation and struggle with insomnia be it in the form of images or cartoon illustration; you'll definitely be spoilt for choice in this collection.