Free sample. The blanket is reusable, waterproof and windproof and can also be used for both ground cover and shade. Perfect for emergency situations where warmth or protection from all-weather conditions is required. Helps prevent hypothermia and shock by retaining/reflecting up to 90percent of a user’s body heat. our blankets can help block rain, snow, and moisture to keep you dry in damp, wet, cold, rainy environments.It is perfect for emergency situations where warmth or protection from all-weather conditions is required.