If your hobbies include ski mountianeering, freeriding, snowmobile riding or any other mountain-related activities, proper avalanche equipment is a must. If the worst comes to pass, you'll have an effective way to save people.
An avalanche beacon will track the burried person with high accuracy, while an avalanche probe will determine the correct spot. With a handy shovel, you'll then get to them in no time. As for prevention, avalanche backpack with airbag minimizes the risk of being burried by snow once the avalanche starts. Thanks to its large volume, you have a high chance of staying on the surface.