Uniqlo
HEATTECH Ultra Warm T-Shirt | High Neck
F Fiber Grade
Left off the list
41% Acrylic, 37% Polyester, 18% Rayon, 4% Elastane
$34.90 We left this one off the list.
Listing confirmed live Jun 12, 2026.
Why it earns an F
- Only 0% natural fiber, below the 50% floor.
- Dominated by 78% petroleum synthetic (41% acrylic, 37% polyester) and 18% regenerated cellulose (18% rayon).
The exact composition
Body 41% Acrylic, 37% Polyester, 18% Rayon, 4% Elastane
We grade the body or shell, the fabric you actually wear. Synthetic linings or trims are shown here but do not change the grade.