Stone Glacier Helio Zip-Off Bottom

When cold weather sets in and your layering system has to work harder, this mid-layer bottom delivers the breathable warmth and low-bulk comfort you need to keep moving. Designed to wear over the Chinook Merino Bottom and under your outer pants, it adds insulating performance without restricting mobility, making it a smart choice for cold sits, active hikes, and long days in snow.

Built with highly breathable microgrid fleece fabric, this layer helps hold warmth while releasing excess heat during stop-and-go activity. Full-leg zips and a Velcro waist closure make it easy to put on or take off without removing your pants or boots, which is a major advantage when conditions shift fast. The forward-placed side zips help reduce hot spots under pants and a pack, while compatibility with Stratum Layered Zipper System pants in the SG line allows fast ventilation from skin to shell. Finished with a zippered fly, premium YKK zippers, and Polygiene odor control technology, this is a practical cold-weather layer for serious days outdoors.

Features

• Highly breathable and warm mid-layer bottom for cold-weather layering
• Designed to be worn over the Chinook Merino Bottom and underneath pants in cold conditions
• Pairs especially well under the M7 Pant in active, late-season, snowy conditions
• Highly breathable microgrid fleece fabric balances warmth, airflow, and comfort
• Full-leg zips allow easy on and off without removing pants or boots
• Velcro waist closure helps make layering changes quick and secure
• Forward-placed side zips help minimize hot spots under pants and a pack
• Integrates with Stratum Layered Zipper System pants in the SG line for instant ventilation from skin to shell
• Zippered fly adds convenience in the field
• Premium YKK zippers for dependable performance
• Polygiene odor control technology helps keep the layer fresher over extended wear

Specifications

• Product Type: Cold-weather mid-layer bottom
• Fabric: Highly breathable microgrid fleece
• Zipper System: Full-leg zips with forward side-zip placement
• Waist Closure: Velcro
• Fly: Zippered
• Odor Control: Polygiene technology
• Zippers: Premium YKK
• Weight: 10.2 oz. (Size Large)

Add this mid-layer bottom to your cold-weather setup for breathable warmth, easier layering changes, and dependable comfort when conditions turn harsh.