Rab technology: waterproofing, insulation and sleeping bags

Understanding how technical materials work helps you make better choices. In this section, we have gathered the Mountain Group guides on the technologies that most influence the performance of a Rab garment or sleep system.

Waterproofing and breathability

Learn what hydrostatic head (HH), MVTR, RET, DWR treatments, and 2, 2.5, and 3-layer constructions mean.

How a waterproof jacket works →

Down and synthetic insulation

Discover how down and synthetic fibers trap air, what fill power means, and in which conditions it is better to prioritize one type of insulation over the other.

Down vs synthetic: how to choose insulation →

Sleeping bags

Understand how baffles, fill power, fill weight, fit, and ISO temperatures influence the performance of a sleeping bag.

How to choose a Rab sleeping bag →

Mountain Group advice

Technical figures are useful for comparison, but the final choice depends on the activity, weather, pace, the weight you want to carry, and your sensitivity to the cold. At Mountain Group, we use these variables to help you choose technical equipment with sound judgment.