When travelling, lightweight/compact binoculars should be on your to-buy list. They’re perfect for backpacking and hiking since they don’t take up much space. However, compact binoculars tend to capture very little light and don’t have that big a view. These limitations can make them strain your eyes faster during continuous use, compared to full-size binoculars.
Recommended sizes are… 8x20, 8x25, 10x20 or 10x25.