SeaCell
Regenerated cellulose fiber infused with seaweed (brown algae). Produced similarly to lyocell but with seaweed integrated into the fiber matrix, adding trace minerals and natural antimicrobial properties.
Material Score Breakdown
7-axis material rubric, not a garment verdict — see disclosure below.
How long the fabric lasts with regular use
Softness, feel against skin, wearability
Air flow and ventilation
Heat retention and insulation
Ability to pull sweat away from skin
Environmental impact of production and disposal
How easy it is to wash, dry, and maintain
Products with seacell
We don't have any seacell products in our catalog yet — it's a rare semi-synthetic fiber. Here are top-rated semi-synthetic alternatives:
What this score doesn't measure
This is a material rating, not a verdict on any specific garment made from seacell. The axes above are research-backed averages for the fiber itself.
- ×Construction. Yarn staple length, weave / knit structure, stitch count, finishing. Identical fiber, very different garments.
- ×Fabric weight (GSM). A 140 GSM tee and a 220 GSM tee made of the same seacell feel and last very differently.
- ×Dye + finishing chemicals. Beyond the three we flag (PFAS, formaldehyde, antimony), dozens of textile finishes aren't modelled.
Best For
Excellent sustainability (82) and biodegradable — great eco choice
Good breathability (75) and moisture wicking (65) for light activity
Good comfort (80) and care ease (60) for casual wear
Good comfort (80) and breathability (75) for sleeping
Good breathability (75) and comfort (80) for undergarments
Detailed Use Case Scores
Pros
- ✓ Natural antimicrobial properties from seaweed minerals
- ✓ Very soft and skin-friendly — suitable for sensitive skin
- ✓ Biodegradable and produced in closed-loop process
- ✓ Excellent moisture management
Cons
- ✗ Niche product with limited supplier availability
- ✗ Premium priced compared to standard lyocell or modal
- ✗ Seaweed mineral benefits diminish with repeated washing
- ✗ Not as durable as conventional synthetic fibers
Better alternatives
Higher-scored semi-synthetic materials. Same category — what to consider instead.
+12 vs SeaCell · 82/100
BiodegradableLenzing branded lyocell made from sustainably harvested eucalyptus wood pulp using a closed-loop process. Softer and more consistent than generic lyocell.
+10 vs SeaCell · 80/100
BiodegradableMade from wood pulp using a closed-loop solvent process. The most sustainable semi-synthetic fiber, with excellent drape and comfort.
+8 vs SeaCell · 78/100
BiodegradableAn ultra-fine variant of modal made from beech tree pulp, with fibers significantly thinner than silk. Exceptionally soft and lightweight, it is the premium choice for high-end underwear and loungewear.
Care Guide
Special Notes
• Lyocell-based — gentle care recommended
• Contains seaweed extract — mild detergent preserves properties
Additional Care Tips
- • Machine wash cold (30°C/85°F) on gentle cycle with mild detergent
- • Avoid bleach and fabric softeners — they strip the seaweed minerals
- • Tumble dry on low heat or lay flat to dry
- • Iron on low heat if needed
- • Wash with similar colors — SeaCell can absorb dyes from other garments
- • Store folded in a cool dry place
Cost
$$$$$
Mid-range
Shrinkage
Minimal shrinkage — follow care instructions
Eco Rating
Strong environmental credentials