Most men give no thought to what they sleep in. Here's why that's worth changing
There's a version of the sleepwear conversation that focuses on aesthetics, looking presentable in the morning, having something decent on if you answer the door. That's fine, but it's not the real reason to care about what you wear to bed.
The real reason is thermal regulation.
Your body temperature drops as you fall asleep and continues to drop through the early hours of the morning. The fabric against your skin plays a meaningful role in how well your body manages that process. Get it wrong, something synthetic that traps heat, or nothing at all on a cold night and your body works harder than it needs to, interrupting the sleep cycles that actually restore you.
The Fabric Problem
Most men default to old gym shorts, threadbare t-shirts, or nothing. Synthetic, polyester, nylon, moisture-wicking performance fabrics, might sound like a sensible choice, but they don't breathe the way natural fibres do. They create a microclimate against your skin that can hold heat when you want to release it and release it when you want to hold it.
Cotton, especially tightly-woven or yarn-dyed cotton from European mills, behaves differently. It absorbs moisture, breathes, and responds to temperature shifts in a way that synthetic fabrics can't replicate. It also softens with washing rather than pilling or degrading.
This isn't marketing, it's why cotton has been the material of choice for sleepwear for centuries before synthetic fibres existed.
What GOTS Certification Actually Means
If you're buying cotton sleepwear, GOTS certification is worth caring about. The Global Organic Textile Standard covers the entire supply chain, not just the farming of the cotton (no synthetic pesticides, no GMO seeds) but also the dyeing, weaving, and sewing processes.
For sleepwear specifically, this matters more than for most clothing categories. You're wearing it for seven or eight hours, often with large areas of skin in direct contact with the fabric. The residual chemicals left in conventionally-processed cotton aren't dramatic, but they're not nothing either, especially if you or anyone in your household has sensitive skin.
GOTS certification also covers the social conditions in the factories where the garments are made. It's not a perfect standard, but it's the most rigorous one that applies to the full textile supply chain.
Why Sets Work Better Than Separates
There's a practical argument for buying a matched pyjama set rather than throwing on whatever's nearby. Proportions matter, a top and bottom designed together will fit and move differently from two items assembled at random. The waistband won't sit where you don't want it. The shirt length will work with the pant rise.
More importantly, having a dedicated set, something you only wear to sleep, signals to your body that sleep is happening. This sounds small. Over time it's not. The habits and rituals around sleep have real effects on how quickly you fall asleep and how deeply you stay there.
The Practical Version
If you're starting from scratch, the short version is:
- Choose cotton over synthetics, especially GOTS-certified if you can find it
- Match the weight of the fabric to your climate (lighter for warmer environments, slightly heavier for cooler ones)
- Buy a set rather than mismatched separates
- Wash at 30°C, air dry rather than tumble dry, it extends the life of the fabric significantly
Men's pyjamas don't need to be complicated. But they're worth thinking about more than most men do.
Hours Between makes pyjamas for men from 100% GOTS-certified cotton, designed in Australia and made in Portugal.