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Thermolite

synthetic
C

Invista engineered hollow-core polyester fiber designed for lightweight insulation. Used as fill or in fabric blends for cold-weather activewear.

Score Breakdown

64/100
Durability75
Comfort65
Breathability50
Warmth85
Moisture Wicking70
Sustainability22
Care Ease78

Best For

🧥Winter Outerwear
Excellent

Excellent warmth (85) and durability (75) for cold weather

👔Formal/Office
Excellent

Excellent durability (75) and comfort (65) for office wear

👕Everyday Casual
Good

Good comfort (65) and care ease (78) for casual wear

🌧️Rain/Weather
Good

Good moisture wicking (70) and durability (75) for weather protection

⛰️Outdoor/Hiking
Good

Good durability (75) and breathability (50) for outdoor activities

Detailed Use Case Scores

outerwear82
activewear78

Pros

  • ✓ Excellent warmth without bulk
  • ✓ Lightweight hollow-core fibers trap air efficiently
  • ✓ Retains insulating ability when wet
  • ✓ Quick-drying compared to down

Cons

  • ✗ Petroleum-based and not biodegradable
  • ✗ Less warm per gram than down
  • ✗ Can compress and lose loft over time
  • ✗ Limited breathability

Care Guide

Washwarm (40°C)
Cyclepermanent press
Detergentregular
BleachDo not bleach
Drytumble low
Ironlow
Dry Cleanavoid
SoftenerNo

Special Notes

• Machine washable — retains insulation when wet

• Tumble dry low

Additional Care Tips

  • • Machine wash cold (30°C/85°F) on gentle cycle with mild detergent
  • • Tumble dry on low heat — some heat helps restore loft in hollow-core fibers
  • • No ironing needed — Thermolite insulation does not wrinkle
  • • Avoid fabric softener and bleach which degrade the hollow-core fiber structure
  • • Store uncompressed when possible to maintain insulation loft over time
  • • Follow garment manufacturer guidelines — Thermolite is usually part of a layered construction

Cost

$$$$$

Mid-range

Shrinkage

Won't shrink with normal washing

Eco Rating

High environmental impact