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The future is ultralight.

Our Materials

We use the finest materials in the world. Each of our bags is optimized for ultralight daily use in the real world.

YKK Zippers

YKK is just the best. We use only custom YKK Water Resistant zippers and sliders on all of our bags. No exceptions! The coated zippers that we use are often referred to as "waterproof," however this is a misleading claim by many manufacturers. These zippers are the finest in the world, and they are very water resistant, almost waterproof. Anyone who says "waterproof" is usually getting a bit excited. Very few zippers are completely 100% waterproof.

GBY Ultralight YKK Water Resistant Zippers

360HD™ — high-density foam protection

360HD is our specially sourced high-density ultralight foam protection for laptops. It is 6 mm (1/4") in thickness, and specially formulated to avoid degradation and compression after continued use. Your $3k laptop is totally safe!

GBY Ultralight - 360HD Foam Laptop Protection

SS2-Ultra™ — Waterproof fabric

Our SS2-Ultra fabric is special for its ultra light weight, soft hand-feel, and supreme durability. It is completely waterproof with two different proprietary coatings.

GBY Ultralight - Materials - SS2-Ultra Waterproof Fabric

QD-Ultra™ — Quilted water resistant fabric

Our QD-Ultra is a special fabric sourced from Japan and quilted in-house for our unique application. Soft to the touch, yet still ultralight and water resistant.

The quilting process reduces water resistance by about 20%. You could probably spritz this material with a garden hose and be just fine; however if you leave QD-Ultra soaking water, the water will be able to seep through the quilted seams over time. This is a small sacrifice for a beautiful quilted fabric.

GBY Ultralight - Materials - QD-Ultra - Quilted Ultralight Water Resistant Fabric