A silk pillowcase is one of those small upgrades that quietly does a lot — especially if you fight frizz or you've invested in a smoothing treatment. Here's what to look for so you don't overpay for the wrong thing.
Why it helps your hair
Cotton pillowcases are surprisingly rough — they create friction as you move in your sleep, roughing up the cuticle and causing frizz, tangles, static and even breakage. Silk's ultra-smooth surface lets hair glide, so you wake up with less bedhead and frizz, and your keratin or smoothing treatment stays smoother for longer. (It's gentler on skin too.)
What to look for
- 100% mulberry silk — the gold standard for smoothness and durability.
- Momme weight 19–25 — this measures silk quality; 22 momme is a great all-rounder. Below ~19 feels thin and wears out faster.
- Closure — a zip or envelope closure stays put better than a plain opening.
- OEKO-TEX / quality certification — a sign of genuine, well-processed silk.
- Care — most are hand-wash or gentle machine wash in a bag.
Silk vs satin
| Silk (mulberry) | Satin | |
|---|---|---|
| Fibre | Natural | Usually polyester weave |
| Smoothness | Excellent | Very good |
| Breathability | High | Lower |
| Durability | High | Moderate |
| Price | Higher | Budget-friendly |
If budget is tight, a satin pillowcase still cuts friction and helps — it's a sensible cheaper alternative.
Our specialist picks
- Best value — ZIMASILK 100% Mulberry Silk (22 momme): the highest-rated mulberry silk pillowcase on Amazon UK, smooth and durable.
- Premium — Slip or Blissy pure silk: luxury mulberry silk, lovely as a gift.
- Tip: on a tight budget, a satin pillowcase still cuts friction and helps frizz.
Get the most from it
A silk pillowcase works best as part of a low-friction routine: loose hair or a silk scrunchie at night, gentle detangling, and a sulfate-free shampoo routine. Want months of smooth, frizz-free hair to protect in the first place? Explore our treatments.
