Whether 15kg of luggage is sufficient for a one-week trip depends entirely on your packing style and destination. For a summer vacation in a warm climate, 15kg is more than enough. A typical 15kg bag can easily hold 7–10 outfits, a couple of pairs of shoes, swimwear, and a full toiletry kit. Experienced "one-bag" travelers often find that 10–12kg is the "sweet spot" for mobility. However, if you are traveling to a cold destination requiring heavy coats and boots, or if you are a "heavy packer" who wants multiple outfit changes per day, 15kg can feel restrictive. To make it work, use packing cubes to compress clothing and choose lightweight, versatile fabrics like linen or merino wool. Wear your heaviest items—like jeans and sneakers—on the plane to save weight in the bag. Be mindful of liquid toiletries, which can add significant weight; switching to solid shampoo bars can save nearly half a kilogram. Ultimately, 15kg is a standard "Medium" allowance for airlines like EasyJet, and with a bit of planning, it allows for a comfortable, flexible week of travel.