The first time I tried a weighted blanket, I felt an immediate sense of calm settle over me. It was like being held—the gentle pressure all over my body sent signals to my nervous system that everything was safe, that I could relax. I wasn't surprised when I later learned that weighted blankets were developed from sensory integration therapy used for children with autism and anxiety disorders. The therapeutic principle is well-established; the question was whether it would work for general sleep improvement. Deep pressure stimulation (DPS) is the mechanism behind weighted blanket effects. Firm, distributed pressure across the body activates the parasympathetic nervous system, reducing heart rate and cortisol levels while increasing serotonin and oxytocin. These physiological changes are the opposite of the stress response—they signal safety and promote relaxation. The effect is similar to swaddling in infants, which is why weighted blankets often remind people of being hugged. Research on weighted blankets for sleep is promising but not definitive. Several controlled studies show improvements in insomnia severity, sleep quality, and daytime fatigue for weighted blanket users compared to control blankets. The effects appear strongest for people with anxiety-related insomnia and those with autism spectrum conditions. Whether these benefits extend to the general population without underlying conditions remains less clear, though many healthy sleepers report subjective benefits. The placebo effect may account for some reported benefits, but placebo effects are still therapeutic effects. If you believe a weighted blanket helps you sleep, and you do sleep better while using it, the mechanism of improvement matters less than the outcome. However, the cost of weighted blankets (typically $100-300) makes it reasonable to understand whether you're likely to benefit before purchasing. Blanket weight selection matters. General recommendations suggest 10% of body weight, plus or minus a few pounds, for optimal effect. Too light provides insufficient pressure; too heavy may feel restrictive or cause overheating. Most manufacturers provide sizing charts based on body weight. Starting with a moderately weighted blanket rather than the heaviest available seems wise for first-time users. Temperature management is critical for weighted blanket success. The same pressure that promotes relaxation also traps heat, potentially causing overheating. Many weighted blankets incorporate cooling materials or are designed with breathable construction. For hot sleepers, weighted blankets with cooling technology or using them as a layer under lighter covers may prevent the overheating that would otherwise disrupt sleep. The practical recommendation: weighted blankets are worth trying if you have anxiety-related sleep difficulties, tend to feel under-stimulated (needing more sensory input to feel settled), or simply enjoy the feeling of being covered and cozy. They're less likely to help if you sleep hot, prefer minimal covering, or have claustrophobic reactions to being contained. Like many sleep interventions, individual response varies enough that personal experimentation is the ultimate test.