Bamboo vs Modal vs Tencel: A Sleepwear Fabric Showdown
Three regenerated cellulose fibres, three different stories
Bamboo viscose, modal, and Tencel are all regenerated cellulosic fibres. The cellulose source is plant-based. The fibre is made by dissolving the cellulose in solvent and extruding it.
The differences come from both the cellulose source and the manufacturing process used to create the fibre. Those differences affect softness, drape, durability, sustainability credentials, and ultimately how the finished sleepwear performs.
Bamboo viscose
Cellulose source: Bamboo plant. Grows fast, requires no pesticides in most regions.
Chemistry route: Most commonly conventional viscose (open-loop solvent recovery). Closed-loop bamboo lyocell is a smaller subset of production.
Hand feel: Heavy drape, smooth, "buttery." Matches well to flowing pajama silhouettes.
Pros: High breathability, moisture-wicking, low cost relative to Tencel.
Cons: Conventional viscose chemistry is not GOTS-eligible. Pilling is moderate. Origin and chemistry transparency varies sharply by mill.
Modal
Cellulose source: Beech tree pulp. Beech grows on managed forestry land, primarily in Austria and Germany.
Chemistry route: Modal-specific viscose process, generally cleaner than conventional viscose but not closed-loop.
Hand feel: Smooth, soft, slightly less drape than bamboo viscose. Often blended with cotton.
Pros: High wash durability (resists pilling well), strong colour retention, soft hand feel.
Cons: Higher cost than bamboo viscose. Limited certification options compared to Tencel.
Tencel (lyocell)
Cellulose source: Eucalyptus pulp from Lenzing's managed forestry. Tencel is the brand name; the generic fibre is lyocell.
Chemistry route: Closed-loop lyocell process recovers over 99% of the solvent. The cleanest of the three. Hand feel: Smooth, cool to the touch, light drape. Tends to feel "expensive."
Pros: Strongest sustainability profile (FSC, EU Ecolabel certified). Excellent breathability and moisture management. Pilling resistance is high.
Cons: Highest cost of the three. Less available at small MOQs because most Tencel ships through Lenzing-licensed mills.
Bamboo viscose vs modal vs Tencel. Side by side.
| Property | Bamboo Viscose | Modal | Tencel (Lyocell) |
|---|---|---|---|
| Cellulose source | Bamboo | Beech | Eucalyptus |
| Solvent recovery | Often open-loop | Cleaner viscose process | Closed-loop, 99%+ |
| Typical FOB unit cost (knit base) | $5.20 to $7.80 | $6.00 to $9.20 | $7.50 to $11.50 |
| Drape | Heavy, fluid | Medium | Light, cool |
| Pilling resistance | Moderate | High | High |
| Top sustainability cert | OEKO-TEX 100 | OEKO-TEX 100 | FSC, EU Ecolabel, OEKO-TEX 100 |
| GOTS eligible | No | No (organic only applies to natural fibres) | No |
| Best for | Drape-forward pajamas, sleep sacks | Wash-cycle durability, t-shirts | Premium positioning, eco story |
| Tobimax MOQ | 200 per style and colour | 200 per style and colour | 200 per style and colour |
Which fabric for which sleepwear product
Sleep sacks (infant 0 to 24 months). Bamboo viscose for summer / lighter TOG. Tencel for premium positioning. Modal is less common in this category.
Snug-fit children's pajamas. Bamboo blend (95/5 with elastane) for a soft cool feel. Modal blend for wash durability across many cycles. Tencel for premium organic-eco brand positioning.
Loose women's nightwear. Modal-cotton blend or Tencel for the cool, smooth hand feel. Bamboo viscose for drape-forward silhouettes.
Common questions
Are bamboo, modal, and Tencel all the same fibre underneath?
No. They are all regenerated cellulosic fibres, but the source plant and the chemistry route are different. The end-product behaviour differs because of those differences.
Which one is most sustainable?
Tencel lyocell has the strongest sustainability profile because of closed-loop chemistry, FSC-certified eucalyptus pulp, and EU Ecolabel coverage. Bamboo viscose can be sustainable when produced in closed-loop lyocell form, but most bamboo viscose on the market is not. Modal sits in between.
Do these fibres require special care?
All three wash cool and tumble low. All three pill less if washed inside-out and not over-dried. None of them tolerate hot tumble drying well.
Why aren't any of these GOTS-certified?
GOTS only applies to natural fibres processed through approved chemistry. Regenerated cellulosics are technically processed fibres. They use OEKO-TEX 100 and (for Tencel) FSC and EU Ecolabel as the relevant certifications.
Can I blend these with cotton?
Yes. Common blends are 60% cotton 40% modal, 95% bamboo 5% elastane, 50% Tencel 50% organic cotton. Each blend trades hand feel against cost against sustainability story.