| What it is | Aerogel-infused PrimaLoft insulation |
| Aerogel | Ultralight, super-insulating solid |
| Benefit | More warmth, no added bulk |
| Used in | PrimaLoft Gold products |
PrimaLoft Cross Core is an insulation technology that infuses PrimaLoft microfibers with aerogel — one of the world’s best-insulating, lightest solid materials — to boost warmth without adding thickness or weight. Used in PrimaLoft Gold products, it delivers more warmth for the same loft, helping make slim, low-bulk yet very warm insulated garments.
Warmth without bulk
An aerogel upgrade to PrimaLoft, found in PrimaLoft Gold — more warmth per unit of loft.
Frequently asked questions
What is PrimaLoft Cross Core?
Cross Core is a PrimaLoft technology that combines its microfiber insulation with aerogel, an extremely light, highly insulating solid originally used in aerospace. By integrating aerogel into the fibers, Cross Core raises the insulation's warmth without increasing its loft or weight, so garments can be warmer while staying slim.
What is aerogel and why is it used here?
Aerogel is a synthetic ultralight material that's mostly air by volume and one of the best-known thermal insulators. Adding it to PrimaLoft lets the insulation trap heat more effectively per unit thickness, which is ideal for making low-profile insulated pieces that are still very warm.
What products use Cross Core?
Cross Core appears in PrimaLoft Gold insulation used by various apparel brands, especially in jackets where designers want maximum warmth in a thin, non-bulky package — for layering under shells or for sleek everyday warmth. It's a premium feature reflecting the high-performance Gold tier.
Sources
- Cross Core Technology — PrimaLoft
- Advanced insulation — The Mountaineers