Waterproofness Table

Here is a brief overview of waterproofness and outerwear and where Toasty Trails heated vests fall within the rating scale:
DWR Level

Waterproof Rating (mm)

Water Resistance Provided

Conditions

1

0-5,000 mm

No resistance to some resistance to moisture

Light rain, dry snow, no pressure

2

6,000-10,000 mm

Rainproof and waterproof under light pressure

Light rain, average snow, light pressure

3

Toasty Trails

11,000-15,000 mm

Rainproof and waterproof except under high pressure

Moderate rain, average snow, light pressure

4

16,000-20,000 mm

Rainproof and waterproof under high pressure

Heavy rain, wet snow, some pressure

5

20,000 mm+

Rainproof and waterproof under very high pressure

Heavy rain, wet snow, high pressure