Grundéns Grundies Thermal 1/2 Zip Dry Lightweight synthetic insulation provides warmth

Lightweight synthetic insulation provides warmth without bulk

accurate casts

and casual warm-weather outfits

traditional feel

making it ideal for throwing streamers

Grundéns Grundies Thermal 1/2 Zip Dry Lightweight synthetic insulation provides warmthThe Grundns Grundies Thermal 1 2 Zip is a heavy weight base layer designed to lock in warmth, manage moisture, and perform in cold, wet fishing conditions. Built with stretch fleece and HeiQ odor control technology, it delivers reliable insulation even when damp while maintaining breathability and freedom of movement. Its functional design makes it an essential layering piece for anglers and outdoor workers facing freezing, high exertion environments.