Many people do indeed wear their Correct Toes to bed as a “night splint” to help passively restore toe splay and address a variety of common foot and toe ailments. Perhaps the biggest benefit of wearing Correct Toes during sleep, though, is improved foot and toe circulation. Keeping your toes splayed at night encourages optimal foot blood flow, which means that blood can get into and out of your foot more easily, helping to wash away harmful metabolic byproducts that can accumulate over time and contribute to problems such as plantar fasciosis.
Anecdotally, some people also report that using Correct Toes as a night splint yields a variety of other benefits, including better sleep, less foot cramping, less foot pain upon awakening, etc. Not everyone who uses the device in this way may experience these benefits, but some people do and there is the possibility that you may too. That being said, one potential reason you might not want to use the spacers at night is that, when you're sleeping, you're not “aware” of your feet, and so if there's any numbness, tingling, or skin irritation, it could go unchecked, which is not optimal.
You can use thin velcro straps looped through the cavities in the device to keep your Correct Toes rooted in place overnight. Note: Make sure the straps aren't too tight; just tighten them enough to make sure the spacers stay in place.
So, for some people, wearing Correct Toes at night can indeed be helpful in improving foot health, but to get the most benefit out of your toe spacers, it's best to use them while weight bearing (i.e., standing, walking, or running). The greatest corrective effect occurs when you wear your Correct Toes inside footwear with an appropriately wide toe box and then participate in weight-bearing activities that impart forces through the joints and tissues of your properly splayed toes. Your tissues will adapt to these forces over time, and your toes will begin to spread out and your foot will become stronger.
Wearing Correct Toes while weight bearing is crucial in achieving long-lasting natural foot health, but there are several other things you can do to help enhance the effectiveness of the toe spacing device. Key among these is performing specific foot exercises, including the Big Toe Stretch, Hammertoe Stretch & Mobilization, and Toe Extensor Stretch. Choosing the appropriate footwear is also extremely important.