Why Souleir 6A-grade Mulberry Silk Pillowcases Have Less Bacteria Than Cotton
Your week-old cotton pillowcase harbours over 17,000 times more bacteria than a toilet seat - that’s 3 to 5 million bacteria per square inch, according to recent National Sleep Foundation research. Leave it unwashed for a month and it becomes 39 times dirtier than your pet’s food bowl. YUK!
Every night, your bedding collects a cocktail of sweat, oils, and roughly 600,000 dead skin cells that you shed daily. Cotton absorbs and traps all of it like a sponge - creating the perfect breeding ground for bacteria, fungi, and dust mites.
“Fitted sheets and pillowcases are particularly susceptible to accumulating dirt due to constant body contact and pressure,” explains Ruthie Osswald, a designer at Brooklinen. “They absorb more sweat and body oils throughout the night.”
But here’s the game-changer
A 6A grade mulberry silk pillowcase from Souleir is dramatically less susceptible to accumulating bacteria than cotton or polyester. Here’s why premium 6A mulberry silk 900 thread count pillowcases (and our silk padded sleep masks) win on hygiene:
Why Souleir’s Silk Resists Bacteria Better Than Cotton
Superior moisture management
Unlike cotton (which holds up to 27× its weight in moisture), our 6A-grade mulberry silk wicks sweat and humidity away quickly and dries faster. Less dampness = far fewer bacteria.
Ultra-smooth surface
The 900 thread count weave doesn’t trap dead skin, oils, or microbes the way rough cotton fibres do.
Natural antimicrobial properties
Mulberry silk contains fibroin proteins with proven antibacterial effects. Independent studies show silk repels moisture and inhibits bacterial growth far better than cotton.
The result?
Your silk pillowcase stays fresher longer, protects your skin from breakouts, keeps your hair smoother, and gives you cleaner sleep - night after night.
How to Wash a Silk Pillowcase the Right Way
Even the best 6A grade mulberry silk pillowcase benefits from smart care. Here’s your essential guide for Souleir products:
Wash weekly
- Dermatologists agree: regular washing prevents oil and sweat buildup that leads to skin issues.
Pro tip for Souleir 900 thread count silk pillowcases:
Cold gentle cycle in a mesh bag with pH-neutral silk detergent, or hand-wash. Air-dry flat. Never tumble dry or wring out as this damages the strands of fibres. Gently squeeze out excess water - your luxurious 6A mulberry finish will stay perfect for years.
Silk Padded Sleep Masks
Your silk padded eye mask sits right against delicate eye skin — treat it gently. Weekly spot-clean or hand-wash keeps the plush silk padding bacteria-free and fresh.
Clean bedding isn’t just about freshness - it’s about better sleep, clearer skin, and healthier hair. When you choose Souleir’s 6A grade mulberry silk pillowcase and silk sleep mask, you’re not just upgrading your bedding… you’re choosing a naturally hygienic solution that cotton simply can’t match.
Ready to ditch the bacteria trap and upgrade to cleaner, cooler, silkier sleep?
Shop Souleir’s 6A grade mulberry silk 900 thread count pillowcases and silk padded sleep masks - designed in Australia for real hair, skin, and hygiene results.
Your cleaner nights start here.
Written by Therese Cassar
