When it comes to snow outerwear, few features are as critical as waterproofing and breathability. The perfect balance of the two ensures that riders stay dry from the outside while avoiding the clammy build-up of sweat on the inside. Dope Snow has invested years of research, testing, and innovation into creating fabrics that meet these demands, while also considering environmental responsibility.
The three-layer system
Every Dope Snow garment begins with a layered approach designed to keep the elements at bay. The outermost woven fabric, typically made from recycled polyester or nylon, provides the first defence against biting winds and falling snow. This dense, plain weave not only improves durability but also enhances the fabric’s natural water resistance.
Bonded to this is a thin yet highly effective thermoplastic polyurethane (TPU) membrane. This hydrophilic film works in two directions: it blocks water droplets from entering, while allowing vapour from perspiration to escape. It is the crucial middle ground where waterproofing and breathability meet. To top it off, the surface is treated with a durable water repellent (DWR) finish. Dope Snow uses HeiQ EcoDry, a PFC- and P-FAS-free treatment that alters the surface tension of the fabric so water beads and rolls away rather than soaking in.
Waterproofing under scrutiny
Laboratory testing shows just how far Dope Snow goes beyond industry benchmarks. The ISO 811 hydrostatic pressure test, which measures resistance to water penetration, typically defines 10,000 mm of water as very good waterproofing. Dope fabrics consistently achieve 15,000 mm H₂O, demonstrating resilience even in heavy, prolonged exposure to snow and rain.
Water repellency is equally important, ensuring that outer layers remain dry to prevent saturation. In the ISO 4920 spray test, Dope fabrics scored a Grade 4 both before and after five wash cycles, retaining 100% repellency initially and 90% even after repeated washing. The Bundesmann test (ISO 9865), which simulates heavy rain, produced results of Grade 5 before washing and Grade 4 after five washes. This confirms that the water-repellent finish does not quickly degrade, maintaining consistent protection over time.
Breathability for long days on the slopes
Breathability is tested using the JIS L1099-B1 Inverted Cup Method, which measures how effectively moisture vapour passes through the fabric. Industry standards consider 10,000 g/m²/24h to be good performance. Dope Snow’s hydrophilic TPU membrane exceeds this with results of over 15,000 g/m²/24h, ensuring riders stay comfortable even during high-energy sessions. This level of breathability prevents the build-up of sweat, a critical factor for comfort and thermal regulation on the mountain.
Built to endure
Dope Snow’s focus extends beyond immediate performance. Rigorous durability testing ensures fabrics maintain their structure and performance even under stress. The bonded membrane is tested for adhesive strength, guaranteeing it remains securely attached to the face fabric through wear and washing. Seam slippage and appearance-after-laundering tests confirm that the garments retain their integrity and finish, even after repeated cycles. This consistency ensures riders receive the same level of waterproofing and breathability season after season.
Performance with responsibility
Perhaps most importantly, these achievements in waterproofing and breathability have not come at the expense of the environment. Dope Snow’s membranes and water-repellent treatments are intentionally free from P-FAS, a group of harmful ‘forever chemicals’. Partnering with bluesign® approved suppliers and adopting solvent-free lamination processes, the brand has made significant strides in reducing the environmental footprint of technical outerwear.
The verdict
Dope Snow’s approach to waterproofing and breathability is both scientific and sustainable. Through a careful balance of dense weaves, high-performance membranes, and environmentally responsible DWR finishes, they have created outerwear that performs where it matters most: on the mountain. Backed by rigorous testing – from ISO 811 waterproofness to JIS L1099-B1 breathability – these fabrics deliver not only on comfort and protection but also on durability and environmental stewardship.
In a market crowded with claims of performance, Dope Snow has chosen transparency, providing test data and verified results to show exactly what their fabrics can do. For riders who demand reliable gear without compromising on sustainability, their approach represents a benchmark in modern snow sports apparel.
Official sources:
- https://www.dopesnow.com/sustainability/why-durability-is-built-into-every-fibre
- https://www.dopesnow.com/sustainability/from-breathability-to-sustainability-the-challenge-of-functional-fabrics
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