How do I choose the XXL size correctly, and how can I tell that the knee warmer fits properly?

The XXL size is intended for those who need a roomier fit around the knee. Before buying, it is recommended to measure the circumference of the leg around the kneecap — this is usually the measurement that determines the right size. For this model, the label states size 6 — knee circumference 42 cm; go by this figure, as sizes can vary between brands.

A correctly chosen knee warmer:

• fits snugly against the leg over its entire surface, leaving no gaps through which heat escapes;
• does not squeeze the joint or leave deep marks on the skin after removal;
• does not slip down when walking or bunch up into folds under the knee;
• does not restrict bending of the leg so much that it interferes with ordinary movement.

If the knee warmer is loose, it will not retain heat as intended. If it presses or causes numbness, the size is too small or it has been put on too tightly. If you have sensitive skin or circulatory problems, it is best to consult a specialist before wearing it for long periods. If irritation or an allergic reaction occurs, stop using it.